Depression and Anxiety · 2008 · 132 citations · 29 references
EducationBehavioral SciencesPsychologyBehavioral DisordersBehavioral HealthPsychotherapyAnxiety DisordersBehavior TherapyCognitive Behavioral TherapyGroup TherapyMental HealthPsychotherapy For Anxiety DisordersCognitive Behavior TherapyGroup Counseling For AnxietyInternet-based Cognitive Behavioral TherapyOnline Group CounselingOnline Group TherapyPhobia TreatmentSocial Anxiety Disorder TreatmentSocial Anxiety Intervention
BACKGROUND: This study investigated the efficacy of an Internet-based self-help program with minimal therapist contact via e-mail for Swedish university students with social phobia and public speaking fears. The main objective was to test if the Internet-based self-help program would be more effective if five live group exposure sessions were added. METHODS: Thirty-eight students meeting the diagnostic and statistical manual of mental disorders, 4th edition criteria for social phobia were randomized into two different treatment groups: Internet delivered cognitive behavior therapy combined with five group exposure sessions (ICBT+ exp) or the Internet program alone (ICBT). RESULTS: Results were analyzed on an intention-to-treat basis. Both treatment groups showed significant improvement from pre- to post-test, and from pre-test to 1-year follow-up, on all measured dimensions (social anxiety, general anxiety, depression levels, and quality of life). For both the groups, the average within-group effect sizes for the primary social anxiety scales, expressed as Cohen's d, were comparable to those seen in traditionally administered cognitive behavioral therapy both at post-test and at 1- year follow-up. CONCLUSIONS: The results suggest that the Internet-based self-help program on its own is efficient in the treatment of university students with social phobia. Adding group exposure sessions did not improve the outcome significantly.
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Statistical Power Analysis for the Behavioral Sciences
Keith E. Muller, Jacob Cohen · Technometrics · 1989 · 83.9K citations
An inventory for measuring clinical anxiety: Psychometric properties.
Aaron T. Beck, Norman Epstein, Gary Brown et al. · Journal of Consulting and Clinical Psychology · 1988 · 11.7K citations