Sleep paralysis

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Sleep_paralysis

 

Sleep paralysis
The Nightmare by Swiss artist Henry Fuseli (1781) is thought to be a depiction of sleep paralysis perceived as a demonic visitation.
Specialty	Psychiatry sleep medicine
Symptoms	Awareness but an inability to move during waking or falling asleep hallucinations
Complications	Nyctophobia
Duration	No more than a couple of minutes
Risk factors	Narcolepsy obstructive sleep apnea alcohol use sleep deprivation
Diagnostic method	Based on description
Differential diagnosis	Narcolepsy atonic seizure hypokalemic periodic paralysis night terror
Treatment	Reassurance sleep hygiene cognitive behavioral therapy antidepressants
Frequency	8–50%
Deaths	None; harmless

Sleep paralysis is a state, during waking up or falling asleep, in which a person is conscious but in a complete state of full-body paralysis. During an episode, the person may hallucinate (hear, feel, or see things that are not there), which often results in fear. Episodes generally last no more than a few minutes. It can recur multiple times or occur as a single episode.

The condition may occur in those who are otherwise healthy or those with narcolepsy, or it may run in families as a result of specific genetic changes. The condition can be triggered by sleep deprivation, psychological stress, or abnormal sleep cycles. The underlying mechanism is believed to involve a dysfunction in REM sleep. Diagnosis is based on a person's description. Other conditions that can present similarly include narcolepsy, atonic seizure, and hypokalemic periodic paralysis. Treatment options for sleep paralysis have been poorly studied. It is recommended that people be reassured that the condition is common and generally not serious. Other efforts that may be tried include sleep hygiene, cognitive behavioral therapy, and antidepressants.

Between 8% and 50% of people experience sleep paralysis at some point during their life. About 5% of people have regular episodes. Males and females are affected equally. Sleep paralysis has been described throughout history. It is believed to have played a role in the creation of stories about alien abduction and other paranormal events.

Symptoms and signs

The main symptom of sleep paralysis is being unable to move or speak during awakening.

Imagined sounds such as humming, hissing, static, zapping and buzzing noises are reported during sleep paralysis. Other sounds such as voices, whispers and roars are also experienced. It has also been known that one may feel pressure on their chest and intense pain in their head during an episode. These symptoms are usually accompanied by intense emotions such as fear and panic. People also have sensations of being dragged out of bed or of flying, numbness, and feelings of electric tingles or vibrations running through their body.

Sleep paralysis may include hallucinations, such as an intruding presence or dark figure in the room. These are commonly known as sleep paralysis demons. It may also include suffocating or the individual feeling a sense of terror, accompanied by a feeling of pressure on one's chest and difficulty breathing.

Pathophysiology

The pathophysiology of sleep paralysis has not been concretely identified, although there are several theories about its cause. The first of these stems from the understanding that sleep paralysis is a parasomnia resulting from dysfunctional overlap of the REM and waking stages of sleep. Polysomnographic studies found that individuals who experience sleep paralysis have shorter REM sleep latencies than normal along with shortened NREM and REM sleep cycles, and fragmentation of REM sleep. This study supports the observation that disturbance of regular sleeping patterns can precipitate an episode of sleep paralysis, because fragmentation of REM sleep commonly occurs when sleep patterns are disrupted and has now been seen in combination with sleep paralysis.

Another major theory is that the neural functions that regulate sleep are out of balance in such a way that causes different sleep states to overlap. In this case, cholinergic sleep "on" neural populations are hyperactivated and the serotonergic sleep "off" neural populations are under-activated. As a result, the cells capable of sending the signals that would allow for complete arousal from the sleep state, the serotonergic neural populations, have difficulty in overcoming the signals sent by the cells that keep the brain in the sleep state. During normal REM sleep, the threshold for a stimulus to cause arousal is greatly elevated. Under normal conditions, medial and vestibular nuclei, cortical, thalamic, and cerebellar centers coordinate things such as head and eye movement, and orientation in space.

In individuals reporting sleep paralysis, there is almost no blocking of exogenous stimuli, which means it is much easier for a stimulus to arouse the individual. The vestibular nuclei in particular has been identified as being closely related to dreaming during the REM stage of sleep. According to this hypothesis, vestibular-motor disorientation, unlike hallucinations, arise from completely endogenous sources of stimuli.

If the effects of sleep "on" neural populations cannot be counteracted, characteristics of REM sleep are retained upon awakening. Common consequences of sleep paralysis include headaches, muscle pains or weakness or paranoia. As the correlation with REM sleep suggests, the paralysis is not complete: use of EOG traces shows that eye movement is still possible during such episodes; however, the individual experiencing sleep paralysis is unable to speak.

Research has found a genetic component in sleep paralysis. The characteristic fragmentation of REM sleep, hypnopompic, and hypnagogic hallucinations have a heritable component in other parasomnias, which lends credence to the idea that sleep paralysis is also genetic. Twin studies have shown that if one twin of a monozygotic pair (identical twins) experiences sleep paralysis that other twin is very likely to experience it as well. The identification of a genetic component means that there is some sort of disruption of a function at the physiological level. Further studies must be conducted to determine whether there is a mistake in the signaling pathway for arousal as suggested by the first theory presented, or whether the regulation of melatonin or the neural populations themselves have been disrupted.

Hallucinations

A picture of a succubus-like vision. My Dream, My Bad Dream, 1915, by Fritz Schwimbeck

Several types of hallucinations have been linked to sleep paralysis: the belief that there is an intruder in the room, the feeling of a presence, and the sensation of floating. One common hallucination is the presence of an Incubus. A neurological hypothesis is that in sleep paralysis the cerebellum, which usually coordinates body movement and provides information on body position, experiences a brief myoclonic spike in brain activity inducing a floating sensation.

The intruder and incubus hallucinations highly correlate with one another, and moderately correlated with the third hallucination, vestibular-motor disorientation, also known as out-of-body experiences, which differ from the other two in not involving the threat-activated vigilance system.

Threat hyper-vigilance

A hyper-vigilant state created in the midbrain may further contribute to hallucinations. More specifically, the emergency response is activated in the brain when individuals wake up paralyzed and feel vulnerable to attack. This helplessness can intensify the effects of the threat response well above the level typical of normal dreams, which could explain why such visions during sleep paralysis are so vivid. The threat-activated vigilance system is a protective mechanism that differentiates between dangerous situations and determines whether the fear response is appropriate.

The hyper-vigilance response can lead to the creation of endogenous stimuli that contribute to the perceived threat. A similar process may explain hallucinations, with slight variations, in which an evil presence is perceived by the subject to be attempting to suffocate them, either by pressing heavily on the chest or by strangulation. A neurological explanation holds that this results from a combination of the threat vigilance activation system and the muscle paralysis associated with sleep paralysis that removes voluntary control of breathing. Several features of REM breathing patterns exacerbate the feeling of suffocation. These include shallow rapid breathing, hypercapnia, and slight blockage of the airway, which is a symptom prevalent in sleep apnea patients.

According to this account, the subjects attempt to breathe deeply and find themselves unable to do so, creating a sensation of resistance, which the threat-activated vigilance system interprets as an unearthly being sitting on their chest, threatening suffocation. The sensation of entrapment causes a feedback loop when the fear of suffocation increases as a result of continued helplessness, causing the subjects to struggle to end the SP episode.

Diagnosis

Sleep paralysis is mainly diagnosed via clinical interview and ruling out other potential sleep disorders that could account for the feelings of paralysis. Several measures are available to reliably diagnose or screen (Munich Parasomnia Screening) for recurrent isolated sleep paralysis.

Diagnosis

Episodes of sleep paralysis can occur in the context of several medical conditions (e.g., narcolepsy, hypokalemia). When episodes occur independent of these conditions or substance use, it is termed "isolated sleep paralysis" (ISP). When ISP episodes are more frequent and cause clinically significant distress or interference, it is classified as "recurrent isolated sleep paralysis" (RISP). Episodes of sleep paralysis, regardless of classification, are generally short (1–6 minutes), but longer episodes have been documented.

It can be difficult to differentiate between cataplexy brought on by narcolepsy and true sleep paralysis, because the two phenomena are physically indistinguishable. The best way to differentiate between the two is to note when the attacks occur most often. Narcolepsy attacks are more common when the individual is falling asleep; ISP and RISP attacks are more common upon awakening.

Differential diagnosis

Similar conditions include:

• Exploding head syndrome (EHS) potentially frightening parasomnia, the hallucinations are usually briefer always loud or jarring and there is no paralysis during EHS.
• Nightmare disorder (ND); also REM-based parasomnia
• Sleep terrors (STs) potentially frightening parasomnia but are not REM based and there is a lack of awareness to surroundings, characteristic screams during STs.
• Noctural panic attacks (NPAs) involves fear and acute distress but lacks paralysis and dream imagery
• Post-traumatic stress disorder (PTSD) often includes scary imagery and anxiety but not limited to sleep-wake transitions

Prevention

Several circumstances have been identified that are associated with an increased risk of sleep paralysis. These include insomnia, sleep deprivation, an erratic sleep schedule, stress, and physical fatigue. It is also believed that there may be a genetic component in the development of RISP, because there is a high concurrent incidence of sleep paralysis in monozygotic twins. Sleeping in the supine position has been found an especially prominent instigator of sleep paralysis.

Sleeping in the supine position is believed to make the sleeper more vulnerable to episodes of sleep paralysis because in this sleeping position it is possible for the soft palate to collapse and obstruct the airway. This is a possibility regardless of whether the individual has been diagnosed with sleep apnea or not. There may also be a greater rate of microarousals while sleeping in the supine position because there is a greater amount of pressure being exerted on the lungs by gravity.

While many factors can increase the risk for ISP or RISP, they can be avoided with minor lifestyle changes.

Treatment

Medical treatment starts with education about sleep stages and the inability to move muscles during REM sleep. People should be evaluated for narcolepsy if symptoms persist. The safest treatment for sleep paralysis is for people to adopt healthier sleeping habits. However, in more serious cases tricyclic antidepressants or selective serotonin reuptake inhibitors (SSRIs) may be used. Despite the fact that these treatments are prescribed there is currently no drug that has been found to completely interrupt episodes of sleep paralysis a majority of the time.

Medications

Though no large trials have taken place which focus on the treatment of sleep paralysis, several drugs have promise in case studies. Two trials of GHB for people with narcolepsy demonstrated reductions in sleep paralysis episodes.

Pimavanserin has been proposed as a possible candidate for future studies in treating sleep paralysis.

Cognitive-behavior therapy

Some of the earliest work in treating sleep paralysis was done using a cognitive-behavior therapy called CA-CBT. The work focuses on psycho-education and modifying catastrophic cognitions about the sleep paralysis attack. This approach has previously been used to treat sleep paralysis in Egypt, although clinical trials are lacking.

The first published psychosocial treatment for recurrent isolated sleep paralysis was cognitive-behavior therapy for isolated sleep paralysis (CBT-ISP). It begins with self-monitoring of symptoms, cognitive restructuring of maladaptive thoughts relevant to ISP (e.g., "the paralysis will be permanent"), and psychoeducation about the nature of sleep paralysis. Prevention techniques include ISP-specific sleep hygiene and the preparatory use of various relaxation techniques (e.g. diaphragmatic breathing, mindfulness, progressive muscle relaxation, meditation). Episode disruption techniques are first practiced in session and then applied during actual attacks. No controlled trial of CBT-ISP has yet been conducted to prove its effectiveness.

Epidemiology

Sleep paralysis is experienced equally in males and females. Lifetime prevalence rates derived from 35 aggregated studies indicate that approximately 8% of the general population, 28% of students, and 32% of psychiatric patients experience at least one episode of sleep paralysis at some point in their lives. Rates of recurrent sleep paralysis are not as well known, but 15–45% of those with a lifetime history of sleep paralysis may meet diagnostic criteria for Recurrent Isolated Sleep Paralysis. In surveys from Canada, China, England, Japan and Nigeria, 20% to 60% of individuals reported having experienced sleep paralysis at least once in their lifetime. In general, non-whites appear to experience sleep paralysis at higher rates than whites, but the magnitude of the difference is rather small. Approximately 36% of the general population that experiences isolated sleep paralysis develop it between 25 and 44 years of age.

Isolated sleep paralysis is commonly seen in patients that have been diagnosed with narcolepsy. Approximately 30–50% of people that have been diagnosed with narcolepsy have experienced sleep paralysis as an auxiliary symptom. A majority of the individuals who have experienced sleep paralysis have sporadic episodes that occur once a month to once a year. Only 3% of individuals experiencing sleep paralysis that is not associated with a neuromuscular disorder have nightly episodes.

Society and culture

Etymology

A 19th century version of Füssli's The Nightmare (1781)

The original definition of sleep paralysis was codified by Samuel Johnson in his A Dictionary of the English Language as nightmare, a term that evolved into the modern definition. The term was first used and dubbed by British neurologist, S.A.K. Wilson in his 1928 dissertation, The Narcolepsies. Such sleep paralysis was widely considered the work of demons, and more specifically incubi, which were thought to sit on the chests of sleepers. In Old English the name for these beings was mare or mære (from a proto-Germanic *marōn, cf. Old Norse mara), hence comes the mare in the word nightmare. The word might be cognate to Greek Marōn (in the Odyssey) and Sanskrit Māra.

Cultural significance and priming

Le Cauchemar (The Nightmare), by Eugène Thivier (1894)

Although the core features of sleep paralysis (e.g., atonia, a clear sensorium, and frequent hallucinations) appear to be universal, the ways in which they are experienced vary according to time, place, and culture. Over 100 terms have been identified for these experiences. Some scientists have proposed sleep paralysis as an explanation for reports of paranormal and spiritual phenomena such as ghosts, alien visits, demons or demonic possession, alien abduction experiences, the night hag and shadow people haunting.

According to some scientists, culture may be a major factor in shaping sleep paralysis. When sleep paralysis is interpreted through a particular cultural filter, it may take on greater salience. For example, if sleep paralysis is feared in a certain culture, this fear could lead to conditioned fear, and thus worsen the experience, in turn leading to higher rates. Consistent with this idea, high rates and long durations of immobility during sleep paralysis have been found in Egypt, where there are elaborate beliefs about sleep paralysis, involving malevolent spirit-like creatures, the jinn.

Research has found that sleep paralysis is associated with great fear and fear of impending death in 50% of sufferers in Egypt. A study comparing rates and characteristics of sleep paralysis in Egypt and Denmark found that the phenomenon is three times more common in Egypt than Denmark. In Denmark, unlike Egypt, there are no elaborate supernatural beliefs about sleep paralysis, and the experience is often interpreted as an odd physiological event, with overall shorter sleep paralysis episodes and fewer people (17%) fearing that they could die from it.

Folklore

Main article: Night hag

The night hag is a generic name for a folkloric creature found in cultures around the world, and which is used to explain the phenomenon of sleep paralysis. A common description is that a person feels a presence of a supernatural malevolent being which immobilizes the person as if standing on the chest. This phenomenon goes by many names.

Albania

In Albanian folk beliefs, Mokthi is believed to be a male spirit with a golden fez hat who appears to women who are usually tired or suffering and stops them from moving. It is believed that if they can take his golden hat, he will grant them a wish, but then he will visit them frequently although he is harmless. There are talismans that can provide protection from Mokthi and one way is to put one's husband's hat near the pillow while sleeping. Mokthi or Makthi in Albanian means "Nightmare".

Bengal

In Bengali folklore, sleep paralysis is believed to be caused by a supernatural entity called Boba (Bengali: বোবা, lit. 'dumb'). Boba attacks a person by strangling him when the person sleeps in a supine position. In Bengal, the phenomenon is called Bobay Dhora (Bengali: বোবায় ধরা, lit. 'Struck by Boba').

Cambodia

Sleep paralysis among Cambodians is known as "the ghost pushes you down," and entails the belief in dangerous visitations from deceased relatives.

Egypt

In Egypt, sleep paralysis is conceptualized as a terrifying jinn attack.

Italy

In the different regions of Italy there are many examples of supernatural beings associated with sleep paralysis. In the regions of Marche and Abruzzo, it is referred to as a Pandafeche [it] or pantafica [it] attack; the Pandafeche usually refers to an evil witch, sometimes a ghostlike spirit or a terrifying catlike creature, that mounts on the chest of the victim and tries to harm him. The only way to avoid her is to keep a bag of sand or beans close to the bed, so that the witch will stop to count how many beans or sand-grains are inside it. A similar tradition is present in the Sardinian folklore, where the Ammuntadore is known as a creature that mounts on the people's chest during their sleep to give them nightmares, and that can change its shape according to the person's fears. In Northern Italy, specifically in the Tyrol area, the Trud is a witch that sits on the people's chest at night, making them unable to breathe; to chase her away, people should make the sign of the Cross, something that would need a great struggle in a situation of paralysis. A similar folklore is present in the Sannio area, around the city of Benevento, where the witch is called Janara. In Southern Italy, sleep paralysis is usually explained with the presence of a sprite standing on the people's chest: if the person manages to catch the sprite (or steal his hat), in exchange for his freedom (or to have his hat back) he can reveal the hiding place of a rich treasure; this sprite has different names in different regions of Italy: Monaciello in Campania, Monachicchio in Basilicata, Laurieddhu or Scazzamurill in Apulia, Mazzmuredd in Molise.

Newfoundland

In Newfoundland, sleep paralysis is referred to as the Old Hag, and victims of a hagging are said to be hag-ridden upon awakening. Victims report being completely conscious, but unable to speak or move, and report a person or an animal which sits upon their chest. Despite the name, the attacker can be either male or female. Some suggested cures or preventions for the Old Hag include sleeping with a Bible under the pillow, calling the sleeper's name backwards or in an extreme example, sleeping with a shingle or board embedded with nails strapped to the chest. This object was called a Hag Board. The Old Hag is well-enough known in the province to be a pop culture figure, appearing in films and plays as well as in crafted objects.

Nigeria

Nigeria has myriad interpretations of the cause of sleep paralysis, due to numerous cultures and belief systems that exist there.

United States

Sleep paralysis is sometimes interpreted as space alien abduction in the United States.

Literature

Various forms of magic and spiritual possession were also advanced as causes in literature. In nineteenth century Europe, the vagaries of diet were thought to be responsible. For example, in Charles Dickens's A Christmas Carol, Ebenezer Scrooge attributes the ghost he sees to "... an undigested bit of beef, a blot of mustard, a crumb of cheese, a fragment of an underdone potato..." In a similar vein, the Household Cyclopedia (1881) offers the following advice about nightmares:

Great attention is to be paid to regularity and choice of diet. Intemperance of every kind is hurtful, but nothing is more productive of this disease than drinking bad wine. Of eatables those which are most prejudicial are all fat and greasy meats and pastry... Moderate exercise contributes in a superior degree to promote the digestion of food and prevent flatulence; those, however, who are necessarily confined to a sedentary occupation, should particularly avoid applying themselves to study or bodily labor immediately after eating... Going to bed before the usual hour is a frequent cause of night-mare, as it either occasions the patient to sleep too long or to lie long awake in the night. Passing a whole night or part of a night without rest likewise gives birth to the disease, as it occasions the patient, on the succeeding night, to sleep too soundly. Indulging in sleep too late in the morning, is an almost certain method to bring on the paroxysm, and the more frequently it returns, the greater strength it acquires; the propensity to sleep at this time is almost irresistible.

J. M. Barrie, the author of the Peter Pan stories, may have had sleep paralysis. He said of himself "In my early boyhood it was a sheet that tried to choke me in the night." He also described several incidents in the Peter Pan stories that indicate that he was familiar with an awareness of a loss of muscle tone whilst in a dream-like state. For example, Maimie is asleep but calls out "What was that....It is coming nearer! It is feeling your bed with its horns-it is boring for [into] you", and when the Darling children were dreaming of flying, Barrie says "Nothing horrid was visible in the air, yet their progress had become slow and laboured, exactly as if they were pushing their way through hostile forces. Sometimes they hung in the air until Peter had beaten on it with his fists." Barrie describes many parasomnias and neurological symptoms in his books and uses them to explore the nature of consciousness from an experiential point of view.

Documentary films

The Nightmare is a 2015 documentary that discusses the causes of sleep paralysis as seen through extensive interviews with participants, and the experiences are re-enacted by professional actors. In synopsis, it proposes that such cultural phenomena as alien abduction, the near-death experience and shadow people can, in many cases, be attributed to sleep paralysis. The "real-life" horror film debuted at the Sundance Film Festival on January 26, 2015, and premiered in theatres on June 5, 2015.

Dream

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Dream

A painting depicting Daniel O'Connell dreaming of a confrontation with George IV, shown inside a thought bubble

A dream is a succession of images, ideas, emotions, and sensations that usually occur involuntarily in the mind during certain stages of sleep. Humans spend about two hours dreaming per night, and each dream lasts around 5 to 20 minutes, although the dreamer may perceive the dream as being much longer than this.

The content and function of dreams have been topics of scientific, philosophical and religious interest throughout recorded history. Dream interpretation, practiced by the Babylonians in the third millennium BCE and even earlier by the ancient Sumerians, figures prominently in religious texts in several traditions, and has played a lead role in psychotherapy. The scientific study of dreams is called oneirology. Most modern dream study focuses on the neurophysiology of dreams and on proposing and testing hypotheses regarding dream function. It is not known where in the brain dreams originate, if there is a single origin for dreams or if multiple regions of the brain are involved, or what the purpose of dreaming is for the body or mind.

The human dream experience and what to make of it has undergone sizable shifts over the course of history. Long ago, according to writings from Mesopotamia and Ancient Egypt, dreams dictated post-dream behaviors to an extent that was sharply reduced in later millennia. These ancient writings about dreams highlight visitation dreams, where a dream figure, usually a deity or a prominent forebear, commands the dreamer to take specific actions, and which may predict future events. Framing the dream experience varies across cultures as well as through time.

Dreaming and sleep are intertwined. Dreams occur mainly in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. Because REM sleep is detectable in many species, and because research suggests that all mammals experience REM, linking dreams to REM sleep has led to conjectures that animals dream. However, humans dream during non-REM sleep, also, and not all REM awakenings elicit dream reports. To be studied, a dream must first be reduced to a verbal report, which is an account of the subject's memory of the dream, not the subject's dream experience itself. So, dreaming by non-humans is currently unprovable, as is dreaming by human fetuses and pre-verbal infants.

Subjective experience and content

Further information: Oneiromancy

Usha Dreaming Aniruddha (oleographic print) Raja Ravi Varma (1848–1906)

Preserved writings from early Mediterranean civilizations indicate a relatively abrupt change in subjective dream experience between Bronze Age antiquity and the beginnings of the classical era.

In visitation dreams reported in ancient writings, dreamers were largely passive in their dreams, and visual content served primarily to frame authoritative auditory messaging. Gudea, the king of the Sumerian city-state of Lagash (reigned c. 2144–2124 BCE), rebuilt the temple of Ningirsu as the result of a dream in which he was told to do so. After antiquity, the passive hearing of visitation dreams largely gave way to visualized narratives in which the dreamer becomes a character who actively participates.

From the 1940s to 1985, Calvin S. Hall collected more than 50,000 dream reports at Western Reserve University. In 1966, Hall and Robert Van de Castle published The Content Analysis of Dreams, in which they outlined a coding system to study 1,000 dream reports from college students. Results indicated that participants from varying parts of the world demonstrated similarity in their dream content. The only residue of antiquity's authoritative dream figure in the Hall and Van de Castle listing of dream characters is the inclusion of God in the category of prominent persons. Hall's complete dream reports were made publicly available in the mid-1990s by his protégé William Domhoff. More recent studies of dream reports, while providing more detail, continue to cite the Hall study favorably.

A soldier dreams: the trenches of WWI. Jan Styka (1858–1925).

In the Hall study, the most common emotion experienced in dreams was anxiety. Other emotions included abandonment, anger, fear, joy, and happiness. Negative emotions were much more common than positive ones. The Hall data analysis showed that sexual dreams occur no more than 10% of the time and are more prevalent in young to mid-teens. Another study showed that 8% of both men's and women's dreams have sexual content. In some cases, sexual dreams may result in orgasms or nocturnal emissions. These are colloquially known as "wet dreams".

The visual nature of dreams is generally highly phantasmagoric; that is, different locations and objects continuously blend into each other. The visuals (including locations, people, and objects) are generally reflective of a person's memories and experiences, but conversation can take on highly exaggerated and bizarre forms. Some dreams may even tell elaborate stories wherein the dreamer enters entirely new, complex worlds and awakes with ideas, thoughts and feelings never experienced prior to the dream.

People who are blind from birth do not have visual dreams. Their dream contents are related to other senses, such as hearing, touch, smell, and taste, whichever are present since birth.

Neurophysiology

Main article: Cognitive neuroscience of dreams

Further information: Neuroscience of sleep

Dream study is popular with scientists exploring the mind–brain problem. Some "propose to reduce aspects of dream phenomenology to neurobiology." But current science cannot specify dream physiology in detail. Protocols in most nations restrict human brain research to non-invasive procedures. In the United States, invasive brain procedures with a human subject are allowed only when these are deemed necessary in surgical treatment to address medical needs of the same human subject. Non-invasive measures of brain activity like electroencephalogram (EEG) voltage averaging or cerebral blood flow cannot identify small but influential neuronal populations. Also, fMRI signals are too slow to explain how brains compute in real time.

Scientists researching some brain functions can work around current restrictions by examining animal subjects. As stated by the Society for Neuroscience, "Because no adequate alternatives exist, much of this research must [sic] be done on animal subjects." However, since animal dreaming can be only inferred, not confirmed, animal studies yield no hard facts to illuminate the neurophysiology of dreams. Examining human subjects with brain lesions can provide clues, but the lesion method cannot discriminate between the effects of destruction and disconnection and cannot target specific neuronal groups in heterogeneous regions like the brain stem.

Generation

The Knight's Dream, 1655, by Antonio de Pereda

Denied precision tools and obliged to depend on imaging, much dream research has succumbed to the law of the instrument. Studies detect an increase of blood flow in a specific brain region and then credit that region with a role in generating dreams. But pooling study results has led to the newer conclusion that dreaming involves large numbers of regions and pathways, which likely are different for different dream events.

Image creation in the brain involves significant neural activity downstream from eye intake, and it is theorized that "the visual imagery of dreams is produced by activation during sleep of the same structures that generate complex visual imagery in waking perception."

Dreams present a running narrative rather than exclusively visual imagery. Following their work with split-brain subjects, Gazzaniga and LeDoux postulated, without attempting to specify the neural mechanisms, a "left-brain interpreter" that seeks to create a plausible narrative from whatever electro-chemical signals reach the brain's left hemisphere. Sleep research has determined that some brain regions fully active during waking are, during REM sleep, activated only in a partial or fragmentary way. Drawing on this knowledge, textbook author James W. Kalat explains, "[A] dream represents the brain's effort to make sense of sparse and distorted information.... The cortex combines this haphazard input with whatever other activity was already occurring and does its best to synthesize a story that makes sense of the information." Neuroscientist Indre Viskontas is even more blunt, calling often bizarre dream content "just the result of your interpreter trying to create a story out of random neural signaling."

Theories on function

Main article: Oneirology

Further information: Rapid eye movement sleep

For many humans across multiple eras and cultures, dreams are believed to have functioned as revealers of truths sourced during sleep from gods or other external entities. Ancient Egyptians believed that dreams were the best way to receive divine revelation, and thus they would induce (or "incubate") dreams. They went to sanctuaries and slept on special "dream beds" in hope of receiving advice, comfort, or healing from the gods. From a Darwinian perspective dreams would have to fulfill some kind of biological requirement, provide some benefit for natural selection to take place, or at least have no negative impact on fitness. Robert (1886), a physician from Hamburg, was the first who suggested that dreams are a need and that they have the function to erase (a) sensory impressions that were not fully worked up, and (b) ideas that were not fully developed during the day. In dreams, incomplete material is either removed (suppressed) or deepened and included into memory. Freud, whose dream studies focused on interpreting dreams, not explaining how or why humans dream, disputed Robert's hypothesis and proposed that dreams preserve sleep by representing as fulfilled those wishes that otherwise would awaken the dreamer. Freud wrote that dreams "serve the purpose of prolonging sleep instead of waking up. Dreams are the GUARDIANS of sleep and not its disturbers."

Grandmother and Granddaughter Dream (1839 or 1840). Taras Shevchenko

A turning point in theorizing about dream function came in 1953, when Science published the Aserinsky and Kleitman paper establishing REM sleep as a distinct phase of sleep and linking dreams to REM sleep. Until and even after publication of the Solms 2000 paper that certified the separability of REM sleep and dream phenomena, many studies purporting to uncover the function of dreams have in fact been studying not dreams but measurable REM sleep.

Theories of dream function since the identification of REM sleep include:

Hobson's and McCarley's 1977 activation-synthesis hypothesis, which proposed "a functional role for dreaming sleep in promoting some aspect of the learning process...." In 2010 a Harvard study was published showing experimental evidence that dreams were correlated with improved learning.

Crick's and Mitchison's 1983 "reverse learning" theory, which states that dreams are like the cleaning-up operations of computers when they are offline, removing (suppressing) parasitic nodes and other "junk" from the mind during sleep.

Hartmann's 1995 proposal that dreams serve a "quasi-therapeutic" function, enabling the dreamer to process trauma in a safe place.

Revonsuo's 2000 threat simulation hypothesis, whose premise is that during much of human evolution, physical and interpersonal threats were serious, giving reproductive advantage to those who survived them. Dreaming aided survival by replicating these threats and providing the dreamer with practice in dealing with them. In 2015, Revonsuo proposed social simulation theory, which describes dreams as a simulation for training social skills and bonds.

Eagleman's and Vaughn's 2021 defensive activation theory, which says that, given the brain's neuroplasticity, dreams evolved as a visual hallucinatory activity during sleep's extended periods of darkness, busying the occipital lobe and thereby protecting it from possible appropriation by other, non-vision, sense operations.

Erik Hoel proposes, based on artificial neural networks, that dreams prevent overfitting to past experiences; that is, they enable the dreamer to learn from novel situations.

Religious and other cultural contexts

Dreams figure prominently in major world religions. The dream experience for early humans, according to one interpretation, gave rise to the notion of a human "soul," a central element in much religious thought. J. W. Dunne wrote:

But there can be no reasonable doubt that the idea of a soul must have first arisen in the mind of primitive man as a result of observation of his dreams. Ignorant as he was, he could have come to no other conclusion but that, in dreams, he left his sleeping body in one universe and went wandering off into another. It is considered that, but for that savage, the idea of such a thing as a 'soul' would never have even occurred to mankind....

Hindu

In the Mandukya Upanishad, part of the Veda scriptures of Indian Hinduism, a dream is one of three states that the soul experiences during its lifetime, the other two states being the waking state and the sleep state. The earliest Upanishads, written before 300 BCE, emphasize two meanings of dreams. The first says that dreams are merely expressions of inner desires. The second is the belief of the soul leaving the body and being guided until awakened.

Abrahamic

Jacob's dream of a ladder of angels, c. 1690. Michael Willmann

In Judaism, dreams are considered part of the experience of the world that can be interpreted and from which lessons can be garnered. It is discussed in the Talmud, Tractate Berachot 55–60.

The ancient Hebrews connected their dreams heavily with their religion, though the Hebrews were monotheistic and believed that dreams were the voice of one God alone. Hebrews also differentiated between good dreams (from God) and bad dreams (from evil spirits). The Hebrews, like many other ancient cultures, incubated dreams in order to receive a divine revelation. For example, the Hebrew prophet Samuel would "lie down and sleep in the temple at Shiloh before the Ark and receive the word of the Lord", and Joseph interpreted a Pharaoh's dream of seven lean cows swallowing seven fat cows as meaning the subsequent seven years would be bountiful, followed by seven years of famine. Most of the dreams in the Bible are in the Book of Genesis.

Christians mostly shared the beliefs of the Hebrews and thought that dreams were of a supernatural character because the Old Testament includes frequent stories of dreams with divine inspiration. The most famous of these dream stories was Jacob's dream of a ladder that stretches from Earth to Heaven. Many Christians preach that God can speak to people through their dreams. The famous glossary, the Somniale Danielis, written in the name of Daniel, attempted to teach Christian populations to interpret their dreams.

Iain R. Edgar has researched the role of dreams in Islam. He has argued that dreams play an important role in the history of Islam and the lives of Muslims, since dream interpretation is the only way that Muslims can receive revelations from God since the death of the last prophet, Muhammad. According to Edgar, Islam classifies three types of dreams. Firstly, there is the true dream (al-ru’ya), then the false dream, which may come from the devil (shaytan), and finally, the meaningless everyday dream (hulm). This last dream could be brought forth by the dreamer's ego or base appetite based on what they experienced in the real world. The true dream is often indicated by Islam's hadith tradition. In one narration by Aisha, the wife of the Prophet, it is said that the Prophet's dreams would come true like the ocean's waves. Just as in its predecessors, the Quran also recounts the story of Joseph and his unique ability to interpret dreams.

In both Christianity and Islam dreams feature in conversion stories. Constantine the Great started his conversion to Christianity because while on campaign he had a dream which prophecised that he would win a battle if he adopted the Chi-Rho as his battle standard.

Buddhist

In Buddhism, ideas about dreams are similar to the classical and folk traditions in South Asia. The same dream is sometimes experienced by multiple people, as in the case of the Buddha-to-be, before he is leaving his home. It is described in the Mahāvastu that several of the Buddha's relatives had premonitory dreams preceding this. Some dreams are also seen to transcend time: the Buddha-to-be has certain dreams that are the same as those of previous Buddhas, the Lalitavistara states. In Buddhist literature, dreams often function as a "signpost" motif to mark certain stages in the life of the main character.

Buddhist views about dreams are expressed in the Pāli Commentaries and the Milinda Pañhā.

Other

Dreaming of the Tiger Spring (虎跑夢泉) Statue at Hupao Spring (Hupaomengquan) in Hangzhou, Zhejiang, China

In Chinese history, people wrote of two vital aspects of the soul of which one is freed from the body during slumber to journey in a dream realm, while the other remained in the body. This belief and dream interpretation had been questioned since early times, such as by the philosopher Wang Chong (27–97 CE).

The Babylonians and Assyrians divided dreams into "good," which were sent by the gods, and "bad," sent by demons. A surviving collection of dream omens entitled Iškar Zaqīqu records various dream scenarios as well as prognostications of what will happen to the person who experiences each dream, apparently based on previous cases. Some list different possible outcomes, based on occasions in which people experienced similar dreams with different results. The Greeks shared their beliefs with the Egyptians on how to interpret good and bad dreams, and the idea of incubating dreams. Morpheus, the Greek god of dreams, also sent warnings and prophecies to those who slept at shrines and temples. The earliest Greek beliefs about dreams were that their gods physically visited the dreamers, where they entered through a keyhole, exiting the same way after the divine message was given.

Antiphon wrote the first known Greek book on dreams in the 5th century BCE. In that century, other cultures influenced Greeks to develop the belief that souls left the sleeping body. The father of modern medicine, Hippocrates (460–375 BCE), thought dreams could analyze illness and predict diseases. For instance, a dream of a dim star high in the night sky indicated problems in the head region, while low in the night sky indicated bowel issues. Greek philosopher Plato (427-347) wrote that people harbor secret, repressed desires, such as incest, murder, adultery, and conquest, which build up during the day and run rampant during the night in dreams. Plato's student, Aristotle (384–322 BCE), believed dreams were caused by processing incomplete physiological activity during sleep, such as eyes trying to see while the sleeper's eyelids were closed. Marcus Tullius Cicero, for his part, believed that all dreams are produced by thoughts and conversations a dreamer had during the preceding days. Cicero's Somnium Scipionis described a lengthy dream vision, which in turn was commented on by Macrobius in his Commentarii in Somnium Scipionis.

Herodotus in his The Histories, writes "The visions that occur to us in dreams are, more often than not, the things we have been concerned about during the day."

The Dreaming is a common term within the animist creation narrative of indigenous Australians for a personal, or group, creation and for what may be understood as the "timeless time" of formative creation and perpetual creating.

Some Indigenous American tribes and Mexican populations believe that dreams are a way of visiting and having contact with their ancestors. Some Native American tribes have used vision quests as a rite of passage, fasting and praying until an anticipated guiding dream was received, to be shared with the rest of the tribe upon their return.

Interpretation

Main article: Dream interpretation

Further information: Psychoanalysis and Precognition

Joseph Interprets Pharaoh's Dream c. 1896–1902. Jacques Joseph Tissot (1836–1902).

Beginning in the late 19th century, Austrian neurologist Sigmund Freud, founder of psychoanalysis, theorized that dreams reflect the dreamer's unconscious mind and specifically that dream content is shaped by unconscious wish fulfillment. He argued that important unconscious desires often relate to early childhood memories and experiences. Carl Jung and others expanded on Freud's idea that dream content reflects the dreamer's unconscious desires.

Dream interpretation can be a result of subjective ideas and experiences. One study found that most people believe that "their dreams reveal meaningful hidden truths". The researchers surveyed students in the United States, South Korea, and India, and found that 74% of Indians, 65% of South Koreans and 56% of Americans believed their dream content provided them with meaningful insight into their unconscious beliefs and desires. This Freudian view of dreaming was believed significantly more than theories of dreaming that attribute dream content to memory consolidation, problem-solving, or as a byproduct of unrelated brain activity. The same study found that people attribute more importance to dream content than to similar thought content that occurs while they are awake. Americans were more likely to report that they would intentionally miss their flight if they dreamt of their plane crashing than if they thought of their plane crashing the night before flying (while awake), and that they would be as likely to miss their flight if they dreamt of their plane crashing the night before their flight as if there was an actual plane crash on the route they intended to take. Participants in the study were more likely to perceive dreams to be meaningful when the content of dreams was in accordance with their beliefs and desires while awake. They were more likely to view a positive dream about a friend to be meaningful than a positive dream about someone they disliked, for example, and were more likely to view a negative dream about a person they disliked as meaningful than a negative dream about a person they liked.

According to surveys, it is common for people to feel their dreams are predicting subsequent life events. Psychologists have explained these experiences in terms of memory biases, namely a selective memory for accurate predictions and distorted memory so that dreams are retrospectively fitted onto life experiences. The multi-faceted nature of dreams makes it easy to find connections between dream content and real events. The term "veridical dream" has been used to indicate dreams that reveal or contain truths not yet known to the dreamer, whether future events or secrets.

In one experiment, subjects were asked to write down their dreams in a diary. This prevented the selective memory effect, and the dreams no longer seemed accurate about the future. Another experiment gave subjects a fake diary of a student with apparently precognitive dreams. This diary described events from the person's life, as well as some predictive dreams and some non-predictive dreams. When subjects were asked to recall the dreams they had read, they remembered more of the successful predictions than unsuccessful ones.

Images and literature

Main article: Dream art

Further information: Dream world (plot device)

Graphic artists, writers and filmmakers all have found dreams to offer a rich vein for creative expression. In the West, artists' depictions of dreams in Renaissance and Baroque art often were related to Biblical narrative. Especially preferred by visual artists were the Jacob's Ladder dream in Genesis and St. Joseph's dreams in the Gospel according to Matthew.

• 
  Nicolas Dipre. Le songe de Jacob. c. 1500 Avignon, Petit Palais.
   
• 
  José de Ribera (1591–1652). El sueño de Jacob, from Prado in Google Earth
   
• 
  Raphael. Jacob's Dream (1518)
   
• 
  Rembrandt. Dream of Joseph (1645)
   
• 
  Anton Raphael Mengs. Traum des Hl. Joseph (1773 or 1774)

Many later graphic artists have depicted dreams, including Japanese woodblock artist Hokusai (1760–1849) and Western European painters Rousseau (1844–1910), Picasso (1881–1973), and Dali (1904–1989).

In literature, dream frames were frequently used in medieval allegory to justify the narrative; The Book of the Duchess and The Vision Concerning Piers Plowman are two such dream visions. Even before them, in antiquity, the same device had been used by Cicero and Lucian of Samosata.

The cheshire cat, John Tenniel (1820–1914), illustration in Alice's Adventures in Wonderland, 1866 edition

Dreams have also featured in fantasy and speculative fiction since the 19th century. One of the best-known dream worlds is Wonderland from Lewis Carroll's Alice's Adventures in Wonderland, as well as Looking-Glass Land from its sequel, Through the Looking-Glass. Unlike many dream worlds, Carroll's logic is like that of actual dreams, with transitions and flexible causality.

Other fictional dream worlds include the Dreamlands of H. P. Lovecraft's Dream Cycle and The Neverending Story's world of Fantastica, which includes places like the Desert of Lost Dreams, the Sea of Possibilities and the Swamps of Sadness. Dreamworlds, shared hallucinations and other alternate realities feature in a number of works by Philip K. Dick, such as The Three Stigmata of Palmer Eldritch and Ubik. Similar themes were explored by Jorge Luis Borges, for instance in The Circular Ruins.

Modern popular culture often conceives of dreams, as did Freud, as expressions of the dreamer's deepest fears and desires. In speculative fiction, the line between dreams and reality may be blurred even more in service to the story. Dreams may be psychically invaded or manipulated (Dreamscape, 1984; the Nightmare on Elm Street films, 1984–2010; Inception, 2010) or even come literally true (as in The Lathe of Heaven, 1971).

Lucidity

Main article: Lucid dream

Lucid dreaming is the conscious perception of one's state while dreaming. In this state the dreamer may often have some degree of control over their own actions within the dream or even the characters and the environment of the dream. Dream control has been reported to improve with practiced deliberate lucid dreaming, but the ability to control aspects of the dream is not necessary for a dream to qualify as "lucid"—a lucid dream is any dream during which the dreamer knows they are dreaming. The occurrence of lucid dreaming has been scientifically verified.

"Oneironaut" is a term sometimes used for those who lucidly dream.

In 1975, psychologist Keith Hearne successfully recorded a communication from a dreamer experiencing a lucid dream. On April 12, 1975, after agreeing to move his eyes left and right upon becoming lucid, the subject and Hearne's co-author on the resulting article, Alan Worsley, successfully carried out this task. Years later, psychophysiologist Stephen LaBerge conducted similar work including:

• Using eye signals to map the subjective sense of time in dreams.
• Comparing the electrical activity of the brain while singing awake and while dreaming.
• Studies comparing in-dream sex, arousal, and orgasm.

Communication between two dreamers has also been documented. The processes involved included EEG monitoring, ocular signaling, incorporation of reality in the form of red light stimuli and a coordinating website. The website tracked when both dreamers were dreaming and sent the stimulus to one of the dreamers where it was incorporated into the dream. This dreamer, upon becoming lucid, signaled with eye movements; this was detected by the website whereupon the stimulus was sent to the second dreamer, invoking incorporation into that dreamer's dream.

Recollection

Further information: Dream diary

Raphael's dream (1821). Johannes Riepenhausen and Franz Riepenhausen.

The recollection of dreams is extremely unreliable, though it is a skill that can be trained. Dreams can usually be recalled if a person is awakened while dreaming. Women tend to have more frequent dream recall than men. Dreams that are difficult to recall may be characterized by relatively little affect, and factors such as salience, arousal, and interference play a role in dream recall. Often, a dream may be recalled upon viewing or hearing a random trigger or stimulus. The salience hypothesis proposes that dream content that is salient, that is, novel, intense, or unusual, is more easily remembered. There is considerable evidence that vivid, intense, or unusual dream content is more frequently recalled. A dream journal can be used to assist dream recall, for personal interest or psychotherapy purposes.

Adults report remembering around two dreams per week, on average. Unless a dream is particularly vivid and if one wakes during or immediately after it, the content of the dream is typically not remembered.

In line with the salience hypothesis, there is considerable evidence that people who have more vivid, intense or unusual dreams show better recall. There is evidence that continuity of consciousness is related to recall. Specifically, people who have vivid and unusual experiences during the day tend to have more memorable dream content and hence better dream recall. People who score high on measures of personality traits associated with creativity, imagination, and fantasy, such as openness to experience, daydreaming, fantasy proneness, absorption, and hypnotic susceptibility, tend to show more frequent dream recall. There is also evidence for continuity between the bizarre aspects of dreaming and waking experience. That is, people who report more bizarre experiences during the day, such as people high in schizotypy (psychosis proneness), have more frequent dream recall and also report more frequent nightmares.

Dream-recording machine

Recording or reconstructing dreams may one day assist with dream recall. Using the permitted non-invasive technologies, functional magnetic resonance imaging (fMRI) and electromyography (EMG), researchers have been able to identify basic dream imagery, dream speech activity and dream motor behavior (such as walking and hand movements).

Miscellany

Illusion of reality

Main article: Dream argument

Some philosophers have proposed that what we think of as the "real world" could be or is an illusion (an idea known as the skeptical hypothesis about ontology). The first recorded mention of the idea was in the 4th century BCE by Zhuangzi, and in Eastern philosophy, the problem has been named the "Zhuangzi Paradox."

He who dreams of drinking wine may weep when morning comes; he who dreams of weeping may in the morning go off to hunt. While he is dreaming he does not know it is a dream, and in his dream he may even try to interpret a dream. Only after he wakes does he know it was a dream. And someday there will be a great awakening when we know that this is all a great dream. Yet the stupid believe they are awake, busily and brightly assuming they understand things, calling this man ruler, that one herdsman—how dense! Confucius and you are both dreaming! And when I say you are dreaming, I am dreaming, too. Words like these will be labeled the Supreme Swindle. Yet, after ten thousand generations, a great sage may appear who will know their meaning, and it will still be as though he appeared with astonishing speed.

The idea also is discussed in Hindu and Buddhist writings. It was formally introduced to Western philosophy by Descartes in the 17th century in his Meditations on First Philosophy.

Absent-minded transgression

Dreams of absent-minded transgression (DAMT) are dreams wherein the dreamer absent-mindedly performs an action that he or she has been trying to stop (one classic example is of a quitting smoker having dreams of lighting a cigarette). Subjects who have had DAMT have reported waking with intense feelings of guilt. One study found a positive association between having these dreams and successfully stopping the behavior.

Non-REM dreams

Hypnogogic and hypnopompic dreams, dreamlike states shortly after falling asleep and shortly before awakening, and dreams during stage 2 of NREM-sleep, also occur, but are shorter than REM-dreams.

Daydreams

Main article: Daydream

Dante Meditating, 1852, by Joseph Noel Paton

A daydream is a visionary fantasy, especially one of happy, pleasant thoughts, hopes or ambitions, imagined as coming to pass, and experienced while awake. There are many different types of daydreams, and there is no consistent definition amongst psychologists. The general public also uses the term for a broad variety of experiences. Research by Harvard psychologist Deirdre Barrett has found that people who experience vivid dreamlike mental images reserve the word for these, whereas many other people refer to milder imagery, realistic future planning, review of memories or just "spacing out"—i.e. one's mind going relatively blank—when they talk about "daydreaming".

While daydreaming has long been derided as a lazy, non-productive pastime, it is now commonly acknowledged that daydreaming can be constructive in some contexts. There are numerous examples of people in creative or artistic careers, such as composers, novelists and filmmakers, developing new ideas through daydreaming. Similarly, research scientists, mathematicians and physicists have developed new ideas by daydreaming about their subject areas.

Hallucination

Main article: Hallucination

A hallucination, in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are perceptions in a conscious and awake state, in the absence of external stimuli, and have qualities of real perception, in that they are vivid, substantial, and located in external objective space. The latter definition distinguishes hallucinations from the related phenomena of dreaming, which does not involve wakefulness.

Nightmare

Main article: Nightmare

Woman having a nightmare. Jean-Pierre Simon (1764–1810 or 1813).

A nightmare is an unpleasant dream that can cause a strong negative emotional response from the mind, typically fear or horror, but also despair, anxiety and great sadness. The dream may contain situations of danger, discomfort, psychological or physical terror. Sufferers usually awaken in a state of distress and may be unable to return to sleep for a prolonged period of time.

Night terror

Main article: Night terror

A night terror, also known as a sleep terror or pavor nocturnus, is a parasomnia disorder that predominantly affects children, causing feelings of terror or dread. Night terrors should not be confused with nightmares, which are bad dreams that cause the feeling of horror or fear.

Déjà vu

Main article: Déjà vu

 

One theory of déjà vu attributes the feeling of having previously seen or experienced something to having dreamed about a similar situation or place, and forgetting about it until one seems to be mysteriously reminded of the situation or the place while awake.

Torrance Tests of Creative Thinking

From Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/Torrance_Tests_of_Creative_Thinking 

The Torrance Tests of Creative Thinking, formerly the Minnesota Tests of Creative Thinking, is a test of creativity built on J. P. Guilford's work and created by Ellis Paul Torrance, the Torrance Tests of Creative Thinking originally involved simple tests of divergent thinking and other problem-solving skills, which were scored on four scales:

• Fluency. The total number of interpretable, meaningful, and relevant ideas generated in response to the stimulus.
• Flexibility. The number of different categories of relevant responses.
• Originality. The statistical rarity of the responses.
• Elaboration. The amount of detail in the responses.

History

In 1976, Arasteh and Arasteh wrote that the most systematic assessment of creativity in elementary school children has been conducted by Torrance and his associates (1960a, 1960b, 1960c, 1961, 1962, 1962a, 1963a, and 1964) with the Minnesota Tests of Creative Thinking, which was later renamed the Torrance Tests of Creative Thinking, with several thousands of schoolchildren. The Minnesota group, in contrast to Guilford, has devised scoring tasks involving both verbal and non-verbal aspects and relying on senses other than vision. They also differ from the battery developed by Wallach and Kogan (1965), which contains measures representing "creative tendencies" that are similar in nature.

Several longitudinal studies have been conducted to follow up on the elementary school-aged students who were first administered the Torrance Tests in 1958 in Minnesota. There was a 22-year follow-up, a 40-year follow-up, and a 50-year follow-up.

Torrance (1962) grouped the different subtests of the Minnesota Tests of Creative Thinking into three categories:

1. Verbal tasks using verbal stimuli
2. Verbal tasks using non-verbal stimuli
3. Non-verbal task

The third edition of the Torrance Tests of Creative Thinking in 1984 removed the "flexibility" scale from the figural test but added "resistance to premature closure" (based on Gestalt psychology) and "abstractness of titles" as two new criterion-referenced scores on the figural. Torrance called the new scoring procedure Streamlined Scoring. With the five norm-referenced measures that he had (fluency, originality, abstractness of titles, elaboration, and resistance to premature closure), he added 13 criterion-referenced measures that include: emotional expressiveness, story-telling articulateness, movement or actions, expressiveness of titles, syntheses of incomplete figures, synthesis of lines and of circles, unusual visualization, extending or breaking boundaries, humor, richness of imagery, colourfulness of imagery, and fantasy.

Tasks

A brief description of the tasks used by Torrance is given below:

Verbal tasks using verbal stimuli

Unusual uses

The unusual uses tasks using verbal stimuli are direct modifications of Guilford's Brick uses test. After preliminary tryouts, Torrance (1962) decided to substitute tin cans and books for bricks. It was believed the children would be able to handle tin cans and books more easily since both are more available to children than bricks.

Impossibilities task

It was used originally by Guilford and his associates (1951) as a measure of fluency involving complex restrictions and large potential. In a course in personality development and mental hygiene, Torrance has experimented with a number of modifications of the basic task, making the restrictions more specific. In this task the subjects are asked to list as many impossibilities as they can.

Consequences task

The consequences task was also used originally by Guilford and his associates (1951). Torrance has made several modifications in adapting it. He chose three improbable situations and the children were required to list out their consequences.

Just suppose task

It is an adaptation of the consequences type of test designed to elicit a higher degree of spontaneity and to be more effective with children. As in the consequence task, the subject is confronted with an improbable situation and asked to predict the possible outcomes from the introduction of a new or unknown variable.

Situations task

The situation task was modeled after Guilford's (1951) test designed to assess the ability to see what needs to be done. Subjects were given three common problems and asked to think of as many solutions to these problems as they can. For example, if all schools were abolished, what would you do to try to become educated?

Common problems task

This task is an adoption of Guilford's (1951) Test designed to assess the ability to see defects, needs and deficiencies and found to be one of the tests of the factors termed sensitivity to problems. Subjects are instructed that they will be given common situations and that they will be asked to think of as many problems as they can that may arise in connection with these situations. For example, doing homework while going to school in the morning.

Improvement task

This test was adopted from Guilford's (1952) apparatus test, which was designed to assess the ability to see defects and all aspects of sensitivity to problems. The subjects are given a list of common objects and are asked to suggest as many ways as they can to improve each object, not concerning whether or not it is possible to implement the change.

Mother-Hubbard problem

This task was conceived as an adoption of the situational task for oral administration in the primary grades and for older groups. This test concerns the development of ideas. The task asks children how they would solve the problem of Old Mother Hubbard going to the cupboard to get her dog a bone but finding it empty.

Imaginative stories task

The child is told to write the most interesting and exciting story they can think of. Topics are suggested (e.g., the dog that did not bark); or the child may use their own ideas.

Cow jumping problems

The cow jumping problem is a companion task for the Mother-Hubbard problem and has been administered to the same groups under the same conditions and scored according to the similar procedures. The task is to think of all possible things which might have happened when the cow jumped over the moon.

Verbal tasks using nonverbal stimuli

Ask and guess task

The ask and guess task requires the individual first to ask questions about a picture – questions which cannot be answered by just looking at the picture. Next they are asked to make guesses or formulate hypotheses about the possible causes of the event depicted, and then their consequences both immediate and remote.

Product improvement task

In this task common toys are used and children are asked to think of as many improvements as they can which would make the toy ‘more fun to play with’. Subjects are then asked to think of unusual uses of these toys other than 'something to play with’.

Unusual uses task

In this task, along with the product improvement task another task (unusual uses) is used. The child is asked to think of the cleverest, most interesting and most unusual uses of the given toy, other than as a plaything. These uses could be for the toy as it is, or for the toy as changed.

Non-verbal tasks (figural)

Incomplete figures task

It is an adaptation of the ‘Drawing completion test’ developed by Kate Franck and used by Barron (1958). On an ordinary white paper an area of fifty four square inches is divided into ten squares each containing a different stimulus figure. The subjects are asked to sketch some novel objects or design by adding as many lines as they can to the ten figures.

Picture construction task or shapes task

In this task the children are given shape of a triangle or a jelly bean and a sheet of white paper. The children are asked to think of a picture in which the given shape is an integral part. They should paste it wherever they want on the white sheet and add lines with pencil to make any novel picture. They have to think of a name for the picture and write it at the bottom.

Circles and squares task

It was originally designed as a nonverbal test of ideational fluency and flexibility, then modified in such a way as to stress originality and elaboration. Two printed forms are used in the test. In one form, the subject is confronted with a page of forty two circles and asked to sketch objects or pictures which have circles as a major part. In the alternate form, squares are used instead of circles.

Creative design task

Hendrickson has designed it which seems to be promising, but scoring procedures are being tested but have not been perfected yet. The materials consist of circles and strips of various sizes and colours, a four-page booklet, scissors and glue. Subjects are instructed to construct pictures or designs, making use of all of the coloured circles and strips with a thirty-minute time limit. Subjects may use one, two, three, or four pages; alter the circles and strips or use them as they are; add other symbols with pencil or crayon.

Science fiction prototyping

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Science_fiction_prototyping
 

Science fiction prototyping (SFP) refers to the idea of using science fiction to describe and explore the implications of futuristic technologies and the social structures enabled by them. Similar terms are design fiction, speculative design, and critical design.

History and progress

The idea was introduced by Brian David Johnson in 2010 who, at the time, was a futurist at Intel working on the challenge his company faced anticipating the market needs for integrated circuits at the end of their 7–10 years design and production cycle. The roots for Science Fiction Prototyping can be traced back to two papers, the first by Callaghan et-al “Pervasive Computing and Urban Development: Issues for the individual and Society”, presented at the 2004 United Nations World Urban Forum which used short stories as a means to convey potential future threats of technology to society and the second, by Egerton et-al "Using Multiple Personas In Service Robots To Improve Exploration Strategies When Mapping New Environments" describing multiple personas and irrational thinking for humanoid robots which inspired Brian David Johnson to write the first Science Fiction Prototype, Nebulous Mechanisms, which went on to become a series of stories that eventually morphed into Intel's 21st Century Robot project. Together Johnson, Callaghan and Egerton formed the Creative Science Foundation as a vehicle to promote and support the use of Science Fiction Prototyping and its derivatives. The first public Science Fiction Prototyping event was Creative Science 2010 (not to be confused with Creation Science), held in Kuala Lumpur, Malaysia on 19 July 2010. This event was also significant as it included the Science Fiction Prototype Tales From a Pod which became the first Science Fiction Prototype to be commercialised (by Immersive Displays Ltd, ImmersaVU). In 2011, a second Science Fiction Prototyping workshop was held in Nottingham (UK), Creative Science 2011, in which Intel made the first documentary about this methodology. Shortly afterwards the Creative Science Foundation was formed as an umbrella organisation to manage Science Fiction Prototyping activity, leading to a proliferation of events and publications; a more detailed account is provided on the Science Fiction Prototyping History web pages.

Methodology

The core methodology is the use of creative arts as a means to introduce innovations into science, engineering, business and socio-political systems. It doesn't aim to forecast the future, rather it focuses on inventing or innovating the future by extrapolating forward trends from research or foresight activities (creating new concepts, schemes, services and products). The main (but not exclusive) methodology is the use of science-fiction stories, grounded in existing practice which are written for the explicit purpose of acting as prototypes for people to explore a wide variety of futures. These 'science fiction prototypes' (SFPs) can be created by scientists, engineers, business or socio-political professionals to stretch their work or, for example, by writers, film/stage directors, school children and members of the public to influence the work of professionals. In this way these stories act as a way of involving the widest section of the population to help set the research agenda. Johnson advocates the following five step process for writing Science Fiction Prototypes:

1. Pick Your Science and Build Your World
2. Identify the Scientific Inflection Point
3. Consider ramifications of the Science on People
4. Identify the Human Inflection Point
5. Reflect on what Did We Learn?

Full Science Fiction Prototypes are about 6–12 pages long, with a popular structure being: an introduction, background work, the fictional story (the bulk of the SFP), a short summary and a summary (reflection). Most often science fiction prototypes extrapolate current science forward and, therefore, include a set of references at the end. Such prototypes can take several days to write and for situations where ideas need to be generated faster (e.g. meetings), the concept of micro science fiction prototypes (μSFP) is used. Generally, μSFP are the size of a Twitter or Text message, being around 25–30 words (140–160 characters in standard English).

Applications

Science fiction prototyping has a number of applications. The most obvious is for product innovation, in which the two earliest examples are Intel's 21st Century Robot (an open innovation project to develop a domestic robot) and Essex University's eDesk (a mixed-reality immersive education desk) both of which were introduced in the previous section. Beyond product innovation, science fiction prototyping finds itself being applied to many diverse areas. For example, at the University of Washington (USA) they have used it to facilitate broader contextual and societal thinking about computers, computer security risks, and security defense as part of an optional senior-level course in computer security. In 2014, these ideas were refined into a SFP methodology called Threatcasting with early adopters including the United States Air Force Academy, the Government of California, and the Army Cyber Institute at West Point Military Academy. An earlier variation called Futurcasting was used by government to provide a tool to influence the direction of society and politics. It did this by using stories about possible futures as a medium to engage the population in conversations about futures they would like to encourage or avoid. Science Fiction Prototyping is also being used in business environments. For example, in Canterbury Christ Church University (UK) Business School it is being used as a vehicle to introduce creative thinking in support of entrepreneurship courses. In the National Taiwan University (Taiwan), it is used to increase business school students' interests in science and technology for business innovation. Elsewhere the Business Schools of the universities of Leeds and Manchester (UK) are exploring its use in community development projects. Finally, it is being applied to Education. For example, in San-Diego State University (USA) Department of Learning Design and Technology they have explored it as a means for motivating pre-university students to take up STEM studies and careers. Further afield, in China, they have identified a novel use for the methodology to address the mandatory requirement for all science and engineering students to take a course in English language. In particular Shijiazhuang University (China) are exploring the potential for Science Fiction Prototyping to overcome the dullness that some science students experience in language learning by using it as an integrated platform for teaching Computer English, combining language and science learning. China is also concerned to improve the creative and innovation capabilities of their graduate which this approach supports.

Strategic foresight

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Strategic_foresight

Strategic foresight is a planning-oriented discipline related to futures studies. In a business context, a more action-oriented approach has become well known as corporate foresight.

Definition and idea

Strategy is a high level plan to achieve one or more goals under conditions of uncertainty. Strategic foresight happens when any planner uses scanned inputs, forecasts, alternative futures exploration, analysis and feedback to produce or alter plans and actions of the organization. Scenario planning plays a prominent role in strategic foresight. The flowchart to the right provides a process for classifying a phenomenon as a scenario in the intuitive logics tradition and differentiates it from many other techniques and approaches to planning.

Process for classifying a phenomenon as a scenario in the Intuitive Logics tradition.

Strategic planning always includes analysis, but it may or may not involve serious foresight on the way to developing a plan, or taking an action. A consideration of possible futures (alternative futures) and of probable futures (forecasts, predictions) is important to developing a preferred future (plan), even the simple mental plans made prior to taking an action. It is the job of the strategic foresight professional to make sure appropriately diverse and relevant inputs, forecasts, and alternatives are considered in the analysis, decision making and planning processes, that plans are appropriately communicated and that when actions are taken, appropriate feedback occurs and after action reviews take place to improve the foresight process.

Strategic foresight is a growing practice in corporate foresight in large companies. Its use is also growing in government and non-profit organisations. In recent years, researchers and managers have also elaborated more on the links between foresight and innovation management.

Strategic foresight can be practiced at multiple levels, including:

1. Personal – "Personal and professional goal-setting and action planning"
2. Organizational – "Carrying out tomorrows' business better"
3. Social – "Moving toward the next civilisation – the one that lies beyond the current hegemony of techno/industrial/capitalist interests"

Quotes

• "Strategic foresight is the ability to create and maintain a high-quality, coherent and functional forward view, and to use the insights arising in useful organisational ways. For example to detect adverse conditions, guide policy, shape strategy, and to explore new markets, products and services. It represents a fusion of futures methods with those of strategic management" (R. Slaughter (1999), p. 287).

"To manage ones expectations according to what is most predictable,act within reason, time is the measure of the function of all things that can be considered equally as important." Curtis Carpenter. Aphorism.