4.3 Article

Increases in External Sensory Observing Cross-Sectionally Mediate the Repair of Positive Affect Following Mindfulness-Based Cognitive Therapy in Individuals with Residual Depression Symptoms

Journal

MINDFULNESS
Volume 14, Issue 1, Pages 113-127

Publisher

SPRINGER
DOI: 10.1007/s12671-022-02032-0

Keywords

Mindfulness; Anhedonia; Positive affect; Depression; Experiential processing

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Mindfulness-Based Cognitive Therapy for Depression (MBCT-D) has been shown to effectively repair positive affect deficits in depressed individuals. This study examined the mechanism of action underlying these changes and found that training the capacity to attend to external sensory experience may be one way in which MBCT-D enhances positive affect in individuals with residual depression.
Objectives Mindfulness-Based Cognitive Therapy for Depression (MBCT-D) has been shown to be effective at repairing positive affect deficits in depressed individuals, but the mechanism of action underpinning these changes has not been empirically examined. To address this issue, secondary analyses of two randomised controlled trials in individuals with residual depression were conducted.Method Study 1 was a cross-sectional mediation analysis of a trial reporting superior effects of MBCT-D to a waitlist control in bolstering momentary positive affect in individuals with residual depression symptoms (n = 130). Study 2 replicated this analysis in the subset of individuals with residual depression symptoms (n = 117) from a second, larger trial comparing MBCT-D to maintenance antidepressants (M-ADM) to prevent depressive relapse that also included a positive affect outcome.Results In Study 1, an increase in external sensory observing uniquely mediated the superiority of MBCT-D over the control in repairing momentary positive affect. Replicating these findings, in Study 2, MBCT-D was superior to M-ADM at repairing positive affect and this was cross-sectionally mediated by changes in external sensory observing.Conclusions These findings suggest that one way in which MBCT-D enhances positive affect in individuals with residual depression may be by training the capacity to attend to external sensory experience.

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