Schizotypal personality disorder is more common in which group?

• A. Biological relatives of bipolar patients
• B. Women with anorexia
• C. People with obsessive-compulsive disorder
• D. Biological relatives of schizophrenics

Answer: (D)

Schizotypal personality disorder sits on the schizophrenia spectrum and is thought to reflect genetic vulnerability to schizophrenia. Because of that, having close biological relatives with schizophrenia increases one’s risk for schizotypal traits more than for other conditions. This makes biological relatives of schizophrenics the group with the strongest association, so they’re the best answer. The other groups—relatives of bipolar patients, women with anorexia, and people with obsessive-compulsive disorder—do not show the same specific familial link to schizotypal features.