Education Commons^™

The Empirical Status Of Acceptance And Commitment Therapy: A Review Of Meta-Analyses, Andrew T. Gloster, Noemi Walder, Michael E. Levin, Michael P. Twohig, Maria Karekla

Psychology Faculty Publications

The efficacy of Acceptance and Commitment Therapy (ACT) has been evaluated in many randomized controlled trials investigating a broad range of target conditions. This paper reviews the meta-analytic evidence on ACT. The 20 included meta-analyses reported 100 controlled effect sizes across n = 12,477 participants. Controlled effect sizes were grouped by target conditions and comparison group. Results showed that ACT is efficacious for all conditions examined, including anxiety, depression, substance use, pain, and transdiagnostic groups. Results also showed that ACT was generally superior to inactive controls (e.g. waitlist, placebo), treatment as usual, and most active intervention conditions (excluding CBT). Weaknesses …

Evaluating Count Outcomes In Synthesized Single-Case Designs With Multilevel Modeling: A Simulation Study, Kirstie L. Bash

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Complex statistical techniques such as multilevel modeling (MLM) ideally require substantial sample sizes in order to avoid assumption violations. Unfortunately, large between-subjects sample sizes can be impractical and, in some cases, impossible in real-world applications. The use of single-case designs (SCD) allow researchers to overcome this issue. The ability to handle non-normal outcomes appropriately in such single-case designs, however, remains unclear, especially when the outcome reflects recurrent event (count) data.

The purpose of this study is to evaluate the utility of MLM for evaluating recurrent event outcomes in synthesized single-case designs. More specifically, this study seeks to determine the effects …