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To provide further information about the psychometric characteristics of the Cognition Checklist (CCL), the CCL was administered to 1,907 outpatients who had various DSM-III-R disorders and 290 university students. Factor analyses supported the scoring of the CCL as 14-item Depression (CCL-D) and 12-item Anxiety (CCL-A) subscales in outpatients and partially supported such scoring in students. The convergent and discriminant validities of the subscales were high for the outpatient sample, but the CCL-A did not display discriminant validity in the student sample. Both sub- scales differentiated (a) students from outpatients and (b) the outpatients, by primary, secondary, and personality diagnostic groups
Steer et al. (Tue,) studied this question.