Mechanisms of exposure and response prevention in obsessive-compulsive disorder: effects of habituation and expectancy violation on short-term outcome in cognitive behavioral therapy

Table 2 Course of mean symptom scores from the time of the first therapy session (t₁) to the time after 20 sessions (t₂₀)

Note. Y-BOCS = Yale-Brown Obsessive-Compulsive Scale interview score; OCI-R = Obsessive Compulsive Inventory - Revised; MADRS = Montgomery-Åsberg Depression Rating Scale; BDI-II = Beck Depression Inventory II; BSI-GSI = Global Severity Index of the Brief Symptom Inventory; GAF = Global Assessment of Functioning; d = Cohen’s d with pooled standard deviations; *** p < .001

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