Biological relatives of patients with schizophrenia demonstrate an increased prevalence of schizotypal personality disorder symptoms, eye tracking deficits, and attentional disturbances. We investigated whether these hypothesized components of a schizophrenia-related phenotype are associated with one another or are independent in nonpsychotic relatives of patients with schizophrenia.
Keefe RSE, Silverman J, Mohs RC, Siever LJ, Harvey PD, Friedman L, Lees Roitman SE, DuPre RL, Smith CJ, Schmeidler J, Davis KL. Eye tracking, attention, and schizotypal symptoms in nonpsychotic relatives of patients with schizophrenia. Archives of General Psychiatry, 1997; 54(2): 169-176.