Schizotypal personality disorder

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Schizotypal personality disorder is identified as a personality disorder characterized by social isolation, as well the exhibition of odd behavior and thinking, often accompanied by unconventional belief systems. [1] There is often a high rate of comorbidity with other personality disorders, which may be due to considerable criteria overlap with other personality disorders, specifically avoidant personality disorder and paranoid personality disorder. [2] Traits of paranoid ideation and unusual experiences tend to remain stable over time, while odd behavior and constricted affect are the least prevalent and most changeable.[3]

Schizotypal personality disorder falls within the A cluster of personality disorders, along with Paranoid personality disorder and Schizoid personality disorder [1]

Diagnostic criteria

Note: The American Psychiatric Association, which publishes the Diagnostic and Statistical Manual of Mental Disorders, forbids the unauthorized reproduction of their diagnostic criteria. A narrative of the DSM-IV-TR criteria follows.


Schizotypal personality disorder shares many similarities with schizophrenia and tends to respond to the same psychoactive medications. [4]


  1. 1.0 1.1 American Psychiatric Association. (2000). Diagnostic and Statistical Manual of Mental Disorders. American Psychiatric Press: Washington DC
  2. McGlashan, T., et al. (2000). The collaborative longitudinal personality disorders study: Baseline axis I/II and II/II diagnostic co-occurrence. Acta Psychiatrica Scandinavica, 102, 256-264.
  3. McGlashan TH, Grilo CM, Sanislow CA, et al (2005). "Two-year prevalence and stability of individual DSM-IV criteria for schizotypal, borderline, avoidant, and obsessive-compulsive personality disorders: toward a hybrid model of axis II disorders". Am J Psychiatry 162 (5): 883–9. DOI:10.1176/appi.ajp.162.5.883. PMID 15863789. Research Blogging.
  4. Schulz SC, Schulz PM, & Wilson WH. (1988). Medication treatment of schizotypal personality disorder. Journal of Personality Disorders 2 (1): 1-13.

Personality disorders
Cluster A (Odd): Schizotypal | Schizoid | Paranoid
Cluster B (Dramatic): Antisocial | Borderline | Histrionic | Narcissistic
Cluster C (Anxious): Dependent | Obsessive-Compulsive | Avoidant