Jp. Chapman et al., DOES THE EYSENCK PSYCHOTICISM SCALE PREDICT PSYCHOSIS - A 10-YEAR LONGITUDINAL-STUDY, Personality and individual differences, 17(3), 1994, pp. 369-375
534 college students were selected by their scores on several scales o
f psychosis proneness, were interviewed, and were given the Eysenck an
d Eysenck (1975) Psychoticism Scale (P-Scale). After 10 yr, 508 subjec
ts were reinterviewed. Subjects identified by initial deviantly high s
cores on the P-Scale (N = 26) did not differ from control subjects (N
= 310) on the rate of subjects who developed psychotic disorders or in
reports of psychotic relatives. However, High P subjects exceeded con
trols on ratings of psychoticlike experiences and on symptoms of schiz
otypal and paranoid personality disorder. The findings indicate that h
igh scorers on the P-Scale are psychoticlike but are not at heightened
risk for psychosis.