The study aims at examining the effects of additional training in manualized cognitive-behavioral therapy (CBT) on outcome in routine psychotherapy for social phobia. The investigators will investigate how CBT, specifically the treatment procedures and manuals proposed by Clark and Wells (1995), can be transferred from controlled trials into the less structured setting of routine clinical care, and whether the health care system benefits from such developments. Private practitioners (N=36) will be randomized to one of two treatment conditions (i.e., training in manualized CBT vs. treatment as usual without specific training). The investigators plan to enroll 160 patients (80 per condition) to be able to detect differences of d=.50 between conditions at 1-beta=.80, given the drop-out rate of 25% (N=116 completers; N=58 per condition). The study is genuinely designed to promote faster and more widespread dissemination of effective interventions. The following research questions can be examined: (1) Can manualized CBT be successfully implemented into routine outpatient care? (2) Will the new methods lead to an improvement of treatment courses aned outcomes? (3) Will treatment effects in routine psychotherapeutic treatments be comparable to those of the controlled, strictly manualized treatment of the main study?