Abstract
Data from the Multiscore Depression Inventory and its 10 subscales were analyzed for test-retest and Kuder-Richardson reliabilities. The test-retest indicated that the generally adequate reliabilities obtained for the scales on the Charleston sample were comparable to those obtained in Chicago. The .71 reliability of the instrumental helplessness subscale, however, was substantially better than that in the previous study, indicating that it may yet be useful as a measure of a relatively stable rather than a transient construct. The Kuder-Richardson reliabilities increased for nine of the subscales at retest, a result which led to a post hoc analysis implicating both mortality and effects of repeated testing, e.g., memory, consistency motivation, as possible causes of increased consistency.
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