“…In a randomized controlled trial that included 61 patients with depression, significant improvements compared with treatment as usual (TAU) were found for self-esteem (d ¼ 1.3) and depression (d ¼ 1.2) after 8 weeks of weekly 2-h COMET sessions administered in a small group, which were retained at a 6-month follow-up (Korrelboom, Maarsingh, & Huijbrechts, 2012). Similar results yielding smaller effect sizes (depression, d¼ .5 -.8; self-esteem, d ¼ .8 -.9) were obtained in additional studies of various clinical groups (Ekkers et al, 2011;Korrelboom, de Jong, Huijbrechts, & Daansen, 2009;Korrelboom, Marissen, & van Assendelft, 2011;van der Gaag, van Oosterhout, Daalman, Sommer, & Korrelboom, 2012). Supporting the application of COMET to anxiety disorders, Korrelboom, Peeters, Blom, and Huijbrechts (2013) found no significant differences in symptom improvement among patients with panic disorder who were assigned to COMET and those assigned to applied relaxation groups after 7 weeks.…”