Clinical Psychology, Psychotherapy, and Counseling Mind–Body, Integrative, Lifestyle, and Behavioral Medicine

The Effectiveness of Behavioral Activation on Affective Lability and Bipolar Symptoms

Behavioral activation affective lability bipolar disorder mood instability psychological intervention

Authors

  • Fereshteh Hooshmand
    fereshtehushmand6868@gmail.com
    Assistant Professor, Psychiatrics Department, School of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran.
In Press
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Objective: This study aimed to evaluate the effectiveness of behavioral activation in reducing affective lability and bipolar symptoms in individuals diagnosed with bipolar disorder.

Methods and Materials: This study utilized a randomized controlled trial design with 30 participants diagnosed with bipolar disorder, recruited from mental health clinics in Tehran. Participants were randomly assigned to either an intervention group receiving eight sessions of behavioral activation or a control group receiving no psychological intervention. Both groups continued their routine pharmacological treatments. The Affective Lability Scale (ALS) and Mood Disorder Questionnaire (MDQ) were administered at three time points: pre-test, post-test, and five-month follow-up. Data were analyzed using repeated measures ANOVA to assess the main effects of the intervention over time, and Bonferroni post-hoc comparisons were used to examine specific group differences.

Findings: The results indicated a significant reduction in affective lability and bipolar symptoms in the intervention group over time compared to the control group. The repeated measures ANOVA revealed significant main effects for group (F(1,54) = 20.45, p = 0.001, η² = 0.28) and time (F(2,54) = 18.67, p = 0.001, η² = 0.26) for affective lability, as well as for bipolar symptoms (F(1,54) = 16.58, p = 0.002, η² = 0.24). Bonferroni post-hoc comparisons confirmed that improvements in the intervention group were significant between pre-test and post-test (p = 0.001) and sustained at follow-up (p = 0.001). The control group showed no significant changes over time.

Conclusion: These findings support the effectiveness of behavioral activation in reducing affective lability and bipolar symptoms, with sustained benefits at follow-up. Given its impact on emotional regulation, behavioral activation may serve as a valuable adjunctive treatment for individuals with bipolar disorder.