Low-Intensity Mindfulness and Cognitive Behavioral Therapy for Social Anxiety Disorder: Pilot Study

A four-session program of mindfulness and cognitive behavioral therapy (M-CBT) is a low-intensity treatment module for individuals with high cost/probability bias and social anxiety symptoms. We tested its effectiveness with 23 patients with social anxiety disorder. The patients completed a set of questionnaires that evaluated social anxiety symptoms, cost/probability bias, fear of negative evaluation from others, self-focused attention, trait mindfulness, depressive symptoms, cognitive reappraisal, and suppression at pretreatment, the time before each session of treatment, post-treatment, and follow-up. Linear mixed-effects models showed that the M-CBT was effective for social anxiety symptoms, cost/probability bias, fear of negative evaluation from others, self-focused attention, trait mindfulness, depressive symptoms, and cognitive reappraisal. The M-CBT also produced significant pre-post-improvements in social anxiety symptoms and cost bias with high effect sizes (social anxiety symptoms: d = 1.04–1.06, cost bias: d = 0.82–1.02). These results suggest that M-CBT is effective for treating social anxiety symptoms and cost bias. This study demonstrates that M-CBT is feasible and acceptable for social anxiety disorder. It may comprise a treatment module for those who do not respond to traditional cognitive behavioral therapy. Trial registration number: University Hospital Medical Information Network (UMIN CTR) UMIN000043720, Registered 23 Mar 2021.