This study explored the criterion-validity of the Cognitive Slippage Scale (CSS) and the Schizotypal Ambivalence Scale (SAS). 27 first-degree relatives of individuals with schizophrenia (9 males, 18 females; M age = 45.3 yr., SD = 13) were compared with 30 first-degree relatives of non-psychotic patients (15 males, 15 females; M age = 44.6 yr., SD = 11.6) on the French versions of the CSS and SAS. The former group, who is at high risk for schizophrenia, had significantly higher scores than the latter group on both scales.
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