No difference in effect size was found between studies comparing CBT to psychological (Hedges’ g = 0.52, 95% CI = 0.38–0.66, P < .0001) versus pill placebo (Hedges’ g = 0.66, 95% CI = 0.36–0.97, P < .0001; QB = 0.71, df = 1, P = n.s.).Furthermore,no difference inpre–post effect sizes for placebo groupswas found between psychological (Hedges’ g = 0.53, 95% CI = 0.44–.63)and pill placebos(Hedges’ g = 0.45,95%CI = 0.35–0.55; QB = 1.47, df = 1, P = n.s.).Finally,no difference was found between effect sizes of self-report measures(Hedges’ g = 0.53,95%CI = 0.40–0.67, P < .0001) and clinician-administered measures(Hedges’ g = 0.50,95%CI = 0.36– 0.64, P < .0001; QB = 0.13,df = 1, P = n.s.).