Cited by 65Mindfulness and Compassion InterventionsPsychotherapy Techniques and ApplicationsAnxiety, Depression, Psychometrics, Treatment, Cognitive Processes

Improvements in Depression and Mental Health After Acceptance and Commitment Therapy are Related to Changes in Defusion and Values-Based Action

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Bramwell, Kate, Richardson, Thomas·2018·Journal of Contemporary Psychotherapy

Abstract

Acceptance and commitment therapy (ACT) has been found to be effective for various mental health disorders but the processes through which it affects change remain unclear. Much process research in the area is on physical rather than mental health, and focuses on the broad concept of psychological flexibility with little research on specific mechanisms identified in theory such as fusion and values. This study explored whether there was a relationship between two of the main ACT processes (cognitive defusion and values) and levels of depression and distress. Thirty-three participants completed questionnaires at the start and end of their treatment measuring general mental health and distress, depression, levels of cognitive fusion and how much they were living in line with their values and how important their values were to them. Results showed reductions in levels of fusion and increases in values-based action were significantly related to reductions in distress and depression. There was no correlation between changes in values importance and changes in distress or depression. This study therefore suggests decreased defusion and increased values-based action is an important mechanism in the efficacy of ACT in those with depression and mental health problems. The study is however limited by a small sample size and future research with a sample large enough for mediation analysis would be beneficial.

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  • Cognitive fusion predicts stress, depression, and anxiety indicators.

    “The predictive role of cognitive fusion on psychopathological indicators of stress, depression, and anxiety has been demonstrated in previous studies (Bramwell & Richardson, 2018)”

    From Mental fatigue and negative emotion among nurses during the COVID-19 pandemic (2022) · cites this paper as Bramwell & Richardson, 2018

    The Results (Bivariate Correlations; page unavailable) report that changes in cognitive fusion correlated with changes in depression and overall distress. The Methods (Statistical Analysis; page unavailable) say the sample was too small for regression, and the Discussion proposes examining individual distress subscales in future work. The paper therefore does not demonstrate that fusion predicts separate stress and anxiety indicators. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Research indicates that the processes of psychological flexibility (e.g., Defusion) can help individuals better manage distressing emotions and thoughts, ultimately promoting emotional well-being and healthier behaviors.

    “Research indicates that the processes of psychological flexibility (e.g., Defusion) can help individuals better manage distressing emotions and thoughts, ultimately promoting emotional well-being and healthier behaviors.29”

    From Differential associations of Acceptance and Commitment Therapy processes with psychological distress across racial groups. (2026) · cites this paper as [29]

    The Introduction describes cognitive defusion as helping people relate differently to thoughts and feelings, and the Discussion reports that reduced fusion was associated with reduced distress and depression. But the Discussion explicitly says the study could not establish causation, and the reported findings do not show that defusion promoted healthier behaviors. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Mental fatigue lowers cognitive control and makes cognitive fusion more likely.

    “mental fatigue leads to reduced cognitive control and is more likely to trigger cognitive fusion (Bramwell & Richardson, 2018).”

    From Mental fatigue and negative emotion among nurses during the COVID-19 pandemic (2022) · cites this paper as Bramwell & Richardson, 2018

    The Discussion reports that reductions in cognitive fusion were associated with improvements in distress and depression, but it does not address mental fatigue or cognitive control. Searches for mental fatigue, reduced cognitive control, and related terms found no passage supporting the claimed sequence. (LLM, conf=0.72)

    Experimental — accuracy not yet measured

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2 of the 29 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Hayes SC Strosahl K Wilson KG Acceptance and commitment therapy: The process and practice of mindful change 2011 2nd New York The Guilford Press

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Authors
Bramwell, K., & Richardson, T.
Affiliations
  • University of Southampton (GB)
  • Solent NHS Trust (GB)
Corresponding author
Bramwell, Kate
Venue
Journal of Contemporary Psychotherapy
Published
2017-09-02
Volume
48
Issue
1
Pages
9-14
ISSN
  • 0022-0116 (ISSN-L)
  • 1573-3564
OpenAlex
W2751427536
Cited by
65
References
29
Citations by year
2026: 6 · 2025: 13 · 2024: 13 · 2023: 4 · 2022: 9 · 2021: 10 · 2020: 6 · 2019: 2 · 2018: 1
FWCI
3.05
Type
journal article
Language
en
Open access
Locations
  • Journal of Contemporary Psychotherapy (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
Funders
Solent NHS Trust
Topics
  • Social Sciences › Psychology › Clinical Psychology › Mindfulness and Compassion Interventions
  • Social Sciences › Psychology › Clinical Psychology › Psychotherapy Techniques and Applications
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Keywords
acceptance and commitment therapy, depression, mental health, cognitive defusion, cognitive fusion, values-based action, psychological flexibility, distress, therapeutic mechanisms, process research

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