| ICD9 = | MeshID = D012569 | }} Schizotypal personality disorder, or simply schizotypal disorder,'s a personality disorder that's characterized by a need for social isolation, odd behavior and thinking, and often unconventional beliefs. Diagnostic criteria (DSM-IV-TR) The American Psychiatric Association's DSM-IV-TR, a widely used manual for diagnosing mental disorders, defines Schizotypal personality disorder as "A pervasive pattern of social and interpersonal deficits marked by acute discomf… (More on Schizotypal)