Acceptance and commitment therapy for psychiatric inpatients diagnosed with depression and insomnia: a multiple-baseline single-case study

The findings suggest that ACT is a promising adjunct intervention, applicable transdiagnostically for individuals suffering from depression and comorbid insomnia in inpatient settings. By enhancing psychological flexibility and symptom acceptance, ACT may offer unique benefits beyond traditional CBT, particularly for patients with residual symptoms, chronic distress, or recurrent depressive episodes. Despite these promising findings, results must be interpreted with caution due to the small sample size and lack of a control group. Future research should replicate and extend these findings in larger randomized controlled trials to further evaluate ACT's potential in inpatient psychiatric care.