Heterogeneity of cognitive style among depressed inpatients.

An inference from the cognitive theories of depression is that only a subset of depressed individuals should exhibit distinctively negative cognitive styles. Although this inference has been supported by previous research, attempts to characterize these depressives have yielded few identifying variables. This study of psychiatric inpatients and normal control subjects identified several characteristics of depressives with very negative cognitive styles by (a) examining traditional depression subtypes, (b) grouping depressives on the basis of clinical observations, and (c) asking whether sex, developmental events, and history and severity of depression predict cognitive styles. We found that borderline personality disorder, negative family dynamics during childhood, a history of sexual abuse, and severity of depression predict cognitive styles. We speculate that aversive developmental events may contribute to cognitive vulnerability to depression.