Schizotypal personality disorder, or simply schizotypal disorder, is a personality disorder that is characterized by a need for social isolation, odd behaviour and thinking, and often unconventional beliefs such as being convinced of having extra sensory abilities.
There is a high rate of comorbidity with other personality disorders. McGlashan et al. (2000) stated that this may be due to overlapping criteria with other personality disorders, such as avoidant personality disorder and paranoid personality disorder.

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This disorder may first appear in childhood and adolescence with solitariness, poor peer relationships, social anxiety, underachievement in school, hypersensitivity, peculiar thoughts and language, and bizarre fantasies. These children may appear ?odd? or ?eccentric? and attract teasing. The course of this disorder is chronic. Only a small proportion of individuals with this disorder go on to develop Schizophrenia or another Psychotic Disorder.