Group Cognitive Behavioural Therapy for Depression: A Preliminary Analysis of the Role of Feedback and Process in Treatment Outcomes

dc.contributor.authorPeterson, Mandisa V.
dc.description.abstractBackground: Group CBT approaches have been shown to be equally as effective as individual CBT for reducing depressive symptoms and preventing relapse; however, the predictors of response are poorly understood. The primary objective of the studies presented in this thesis was to further examine the formal and process factors within group CBT for depression that contribute to various treatment outcomes. The first study investigated the relationship between group CBT for depression and changes in interpersonal distress, as well as the process mechanisms that might influence this relationship. The second study assessed whether formal feedback provided to therapists and clients derived from the Outcome Questionnaire (OQ-45), a robust measure of client functioning, would enhance group processes and treatment outcomes. Method: Study 1: Secondary data from clients having received individual CBT for depression at a community-based mental health training centre constituted one condition (18 clients). Data for the group condition (12 clients) were collected from clients attending group CBT for depression at a tertiary care facility. Relationship distress, as measured by the OQ-45 relationship distress subscale score, was assessed at intake and termination. Group participants also completed process measures at the start and end of treatment. In study 2, participants were recruited from a tertiary care facility to participate in a CBT group for depression. Participation involved completing brief questionnaires assessing psychological and process variables before and after treatment, as well as the OQ-45 at every session. Three groups (21 clients) received standard CBT and two groups (12 clients) received enhanced CBT, which included feedback about their progress from the OQ-45. Results: Results of study 1 suggest that clients who participated in group CBT experienced a significantly greater reduction in relationship distress across time than clients who participated in individual CBT. Results also indicate that therapeutic alliance, and not group cohesion, mediates the relationship between pretreatment relationship distress on posttreatment relationship distress in group CBT. Results of study 2 indicate that participants in the enhanced condition experienced greater improvements in quality of life, dysfunctional beliefs, and therapeutic bond at termination, relative to participants in the standard condition. Trends also suggest a greater reduction in depressive symptoms. Conclusions: Group CBT for depression may be more effective than the individual modality for reducing interpersonal distress. Furthermore, therapeutic alliance plays a significant role in improving interpersonal distress within a structured group CBT protocol. Feedback from the OQ-45 may help improve client outcomes and enhance therapeutic bonding with facilitators in group CBT for depression.
dc.publisherUniversité d'Ottawa / University of Ottawa
dc.subjectGroup therapy
dc.subjectCognitive Behavioural Therapy
dc.subjectRelationship distress
dc.subjectProcess factors
dc.subjectOutcome Questionnaire
dc.subjectProgress monitoring
dc.subjectTherapeutic alliance
dc.subjectGroup cohesion
dc.titleGroup Cognitive Behavioural Therapy for Depression: A Preliminary Analysis of the Role of Feedback and Process in Treatment Outcomes
dc.contributor.supervisorKogan, Cary sociales / Social Sciences
uottawa.departmentPsychologie / Psychology
CollectionThèses, 2011 - // Theses, 2011 -