Impact of perfectionism and need for approval on the brief treatment of depression: The National Institute of Mental Health Treatment of Depression Collaborative Research Program revisited.

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Abstract
Patients in the National Institute of Mental Health Treatment of Depression Collaborative Research Program (TDCRP) were administered at intake with the Dysfunctional Attitude Scale (DAS; A. N. Weissman & A. T. Beck, 1978). Factor analyses of the DAS in the TDCRP data as well as in several independent samples reveal two primary factors: an interpersonal factor, Need for Approval, and a self-critical factor, Perfectionism. This study explored the hypotheses that these factors, assessed prior to treatment, would have differential interactions with the two forms of psychotherapy evaluated in the TDCRP as well as differential relationships to various outcome measures (depression, clinical functioning, and social adjustment). DAS Perfectionism had consistently significant negative relationships with all the outcome measures in all four treatment conditions. Contrary to expectations, however, there were no significant interactions between the two DAS factors and the four types of brief treatment (cognitive-behavioral therapy, interpersonal therapy, imipramine, and placebo).

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