A Multimethod Validation of the Inpatient Multidimensional Psychiatric Scale with Chronically Institutionalized Patients
نویسندگان
چکیده
The convergent and discriminant validity of the Inpatient Multidimensional Psychiatric Scale (IMPS) for chronically institutionalized patients was assessed over three modes of assessment (interview ratings, ward ratings, and observed frequency of behavior), two settings (interview and ward), and two points in time. Sequential performance of raw-score intercorrelations, principal-components analyses, and multimethod factor analysis indicated that the IMPS possessed excellent concurrent validity. However, it failed to demonstrate the same utility as a measure of change. Caution should therefore be exercised in any usage of the IMPS where absolute level differences are required for evaluative assessment.
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