Which is NOT a biological factor that is common to people with schizophrenia and people with schizotypal personality disorder?

Question

Quizplus · Accepted Answer

High levels of dopamine and enlarged brain ventricles are common biological factors in both schizophrenia and schizotypal personality disorder. Loss of gray matter has also been found in both disorders. However, reduced activity of serotonin is not a commonly reported biological factor in either disorder.

Which Is NOT a Biological Factor That Is Common to People