Sangam: A Confluence of Knowledge Streams

Why do psychological treatments work? A process analysis comparing Cognitive Behavioural Therapy and Behavioural Activation in the treatment of depression

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dc.contributor O'Mahen, Heather
dc.contributor Wright, Kim
dc.creator Ladwa, A
dc.date 2022-08-30T11:05:53Z
dc.date 2022-08-30
dc.date 2022-08-26T14:40:06Z
dc.date 2022-08-30T11:05:53Z
dc.date.accessioned 2023-02-23T12:15:57Z
dc.date.available 2023-02-23T12:15:57Z
dc.identifier http://hdl.handle.net/10871/130600
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/258603
dc.description Depression is a debilitating and recurrent mental health problem. Although there are a number of effective psychological treatments for adult depression, around 50% of individuals do not recover (Cuijpers et al., 2021). To improve the effectiveness of these treatments we need to understand how they work. Previous research has identified times in treatment when there are patterns of discontinuous depression change and these times have been used to examine processes of change to further understand how treatments lead to depression change. The aim of this thesis was to build upon this research to further understand discontinuous depression changes in and outside of treatment, the processes of change surrounding these times of depression variability, and how they relate to treatment outcomes. This thesis primarily focused on two patterns of discontinuous change; rapid improvements in depression symptoms, known as ‘sudden gains’ (Tang & DeRubeis, 1999) and ‘depression spikes’ which are transient increases in depression symptoms (Hayes, Feldman, Beevers, et al., 2007). To examine this four studies were conducted. Study one investigated the rates, timing, and association with treatment outcomes of sudden gains and depression spikes in a large scale clinical practice dataset. Study two explored client cognitive and behavioural processes of change surrounding sudden gains in cognitive behavioural therapy (CBT) and behavioural activation (BA), and their association with treatment outcomes in a trial dataset. Study three used the same trial dataset to explore predictors of depression spikes in CBT and BA, and their relation to treatment outcomes. Study four focused on how cognitive and behavioural avoidance are associated with depression variability outside of treatment across a stressful life period in a student sample. The thesis ends with a discussion of the methodological, theoretical, and clinical implications of the findings and suggestions for future research.
dc.publisher University of Exeter
dc.publisher Psychology
dc.rights 2024-02-26
dc.rights I wish to place an embargo on my thesis for 18 months because I wish to publish papers using material that is substantially drawn from my thesis
dc.rights http://www.rioxx.net/licenses/all-rights-reserved
dc.subject Depression
dc.subject Sudden Gains
dc.subject Depression Spikes
dc.subject Cognitive Behavioural Therapy
dc.subject Behavioural Activation
dc.title Why do psychological treatments work? A process analysis comparing Cognitive Behavioural Therapy and Behavioural Activation in the treatment of depression
dc.type Thesis or dissertation
dc.type PhD in Psychology
dc.type Doctoral
dc.type Doctoral Thesis


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