From Wikipedia, the free encyclopedia
 
Schizotypal disorder
A man sitting on a bench alone looking at the ocean.
People with STPD often feel isolated from society.
SpecialtyPsychiatry
SymptomsIdeas of reference, unusual beliefs, perceptual Illusions, odd thinking and speech, suspiciousness, inappropriate affect, strange behavior, lack of friends, paranoid social anxiety
ComplicationsSchizophrenia, substance use disorder, major depressive disorder
Usual onset10–20 year old
DurationLifelong
Risk factorsFamily history
Differential diagnosisCluster A personality disorders, borderline personality disorder, avoidant personality disorder, autism spectrum disorder, social anxiety disorder, ADHD-PI (ADD)
FrequencyEstimated 3% of general population

Schizotypal personality disorder (STPD or SPD), also known as schizotypal disorder, is a mental and behavioral disorder. DSM classification describes the disorder specifically as a personality disorder characterized by thought disorder, paranoia, a characteristic form of social anxiety, derealization, transient psychosis, and unconventional beliefs. People with this disorder feel pronounced discomfort in forming and maintaining social connections with other people, primarily due to the belief that other people harbor negative thoughts and views about them. Peculiar speech mannerisms and socially unexpected modes of dress are also characteristic. Schizotypal people may react oddly in conversations, not respond, or talk to themselves. They frequently interpret situations as being strange or having unusual meaning for them; paranormal and superstitious beliefs are common. Schizotypal people usually disagree with the suggestion their thoughts and behaviors are a 'disorder', and seek medical attention for depression or anxiety instead. Schizotypal personality disorder occurs in approximately 3% of the general population and is more commonly diagnosed in males.

History