The Chapman psychosis-proneness scales: Consistency across culture and time

• Confirmatory factor analyses support a two-factor model.
• PAS and MIS scales comprise a positive schizotypy factor.
• RSAS and RPAS comprise a negative schizotypy factor.
• The measurement of schizotypal traits appears consistent across cultures.
• The Chapman psychosis-proneness scales are stable over time.

The purpose of the present study was to examine the factor structure and the temporal stability of the Chapman psychosis-proneness scales in a representative sample of nonclinical Chinese young adults. The four psychosis-proneness scales evaluated were the Perceptual Aberration (PAS), Magical Ideation (MIS), revised Social Anhedonia (RSAS), and revised Physical Anhedonia (RPAS) scales. The sample consisted of 1724 young adults with a mean age of 18.8 years (S.D.=0.84). The results of the confirmatory factor analyses indicated that the best fitting model was a two-factor model with positive schizotypy (PER and MIS) scales and negative schizotypy (RSAS and RPAS) scales. The data add to the growing literature indicating that the measurement of schizotypal traits is consistent across cultures. In addition, the results support the measurement invariance of the Chapman psychosis-proneness scales across time, i.e., there was ample evidence of test–retest reliability over a test interval of 6 months.