Predictors of response to cognitive-behavioral group therapy for social phobia.

Response to cognitive-behavioral group therapy for social phobia was assessed at posttest and 6-month follow-up in a sample of 62 clients (41 generalized subtype, 21 nongeneralized). Predictors assessed were depression, expectancy, personality disorder traits, clinician-rated breadth and severity of impairment, and frequency of negative thoughts during social interactions. Outcome measures included self-report questionnaires and behavioral tests of dyadic interaction and a public speech. Although no predictor was related to outcome across all domains of measurement, higher depression, more avoidant personality traits, and lower treatment expectancy were each related to poorer treatment response on one or more outcome criteria. Cognitive change was consistently associated with change on self-report symptom measures, but, contrary to expectation, lower rates of negative thinking at posttest did not predict better maintenance of treatment gains at follow-up.