255 International Journal of Cognitive Therapy, 10(3), 255–268, 2017 © 2017 International Association for Cognitive Psychotherapy This study was supported in part by a grant from the Military Suicide Research Consortium, an effort supported by the Office of the Assistant Secretary of Defense for Health Affairs under Award No. (W81X- WH-10-2-0181) and financial assistance from the University of Bern, Switzerland. Opinions, interpreta- tions, conclusions, and recommendations are those of the authors and are not necessarily endorsed by the Military Suicide Research Consortium or the Department of Defense. Address correspondence to Melanie Hom, Department of Psychology, Florida State University, 1107 West Call St., Tallahassee, FL 32306; E-mail: hom@psy.fsu.edu HOM ET AL. GAINS IN CBASP Gains in Cognitive Behavioral Analysis System of Psychotherapy: Examining Treatment Progress and Processes of Change in a Psychiatric Outpatient Sample Melanie A. Hom, Ian H. Stanley, and Ana Vazquez Department of Psychology, Florida State University, Tallahassee, Florida Martina Belz Department of Psychology, University of Bern, Switzerland Thomas E. Joiner Department of Psychology, Florida State University, Tallahassee, Florida This study aimed to evaluate: (1) treatment progress utilizing the cognitive behav- ioral analysis system of psychotherapy (CBASP) in an outpatient community sam- ple and (2) whether treatment gains might be accounted for by situational analysis performance. A total of 24 psychiatric outpatients receiving CBASP from psychol- ogy trainees participated in this study. Repeated measures ANOVAs were utilized to examine changes in self-reported depression symptoms over four sessions and clinician global functioning ratings over the treatment course. Self-reported depres- sion symptoms and clinician-rated patient functioning significantly improved over four sessions and the treatment course, respectively. After accounting for the effects of situational analysis performance, these metrics no longer significantly improved. Findings point to the potential effectiveness of CBASP delivered by trainees in improving depression symptoms and overall functioning. Results also suggest that further investigation of a patient’s ability to successfully conduct situational analy- ses may be indicated since this ability may contribute to these improvements. Keywords: cognitive behavioral analysis system of psychotherapy, CBASP, depression, psychotherapy, treatment