Traductions françaises et validations des échelles de dérapage cognitif (Cognitive Slippage Scale, Miers et Raulin, 1987) et d'ambivalence schizotypique (Schizotypal Ambivalence Scale, Raulin, 1986)

The mean of the correlations between each item and the total score was calculated (CSS : 0.41 in the university sample ; 0.44 in the general hospital sample ; SAS : 0.46 in the university sample ; 0.49 in the general hospital sample). The discriminant validity was studied by a Student's t test showing that the schizotypal university students had significant higher scores on the CSS and SAS than the healthy university students. The reliability was explored using a test-retest in the 30 healthy subjects. The subjects filled out the scales three months after the first testing. The intraclass coefficients were 0.81. Finally, the cutoff scores were calculated following the procedure described by Chapman et al. (score higher than two standard deviations above the mean of the university sample). The values for the CSS and SAS were respectively 15 and 12 for males and females.