2.2.2. Depression/CBT Beliefs Scale
depression
Nine items categorised into three three-item subscales were developed to assess the extent to which participants agreed with the biology-, relationship-, and stress-oriented explanatory models of depression and the change mechanisms in CBT for depression (e.g., “Cognitive behavioural therapy for depression works to relieve symptoms by changing brain chemistry and structure”). Responses were marked on a Likert scale ranging from 1 (“Completely disagree”) to 7 (“Completely agree”). Three subscales (i.e., the believability of the biology-, relationship-, and stress-based explanatory models) were calculated from the nine items by adding the scores of the items assessing believability within each model. High scores indicated greater endorsements of the respective explanatory model. In the current study, Cronbach’s alpha was 0.75 for the biological model, 0.68 for the relationship model, and 0.71 for the stress model. 