RT info:eu-repo/semantics/article T1 Meta-analysis of randomized controlled trials and single-case designs on the efficacy of functional analytic psychotherapy. A1 López Pinar, Carlos A1 Galán Doña, David A1 Tsai, Mavis A1 Macías Morón, Juan José K1 Psicología K1 Psychology K1 Psicoterapia K1 Psychotherapy AB Functional analytic psychotherapy (FAP) is an approach based on contextual behavioral principles with a focus on interpersonal issues. This review quantitatively synthesized the evidence on the efficacy of FAP in addressing various clinical outcomes. A systematic literature search was conducted. After study selection, coding, and data extraction, outcomes were meta-analyzed using a random-effects model. Subgroup analyses, metaregressions, and bias assessments were performed. Seventy studies met the inclusion criteria. Results from single-case designs showed significant improvements in idiographic clinically relevant behaviors (i.e., avoidance of intimacy and conflict vs. engaging in intimacy-promoting behaviors, assertive expression of feelings and needs). Controlled group studies showed robust results for depression and anxiety symptoms. No significant changes were found for anger, experiential avoidance, and mindfulness. Thus, our results provide empirical support for FAP in the treatment of interpersonal behaviors and internalizing symptoms, although bias in the included studies may limit these findings. PB American Psychological Association SN 0969-5893 YR 2024 FD 2024-06 LK http://hdl.handle.net/10259/9928 UL http://hdl.handle.net/10259/9928 LA eng DS Repositorio Institucional de la Universidad de Burgos RD 15-ene-2025