Three-Principles Approach for Incarcerated Adults

The purpose of the study is to examine the feasibility, acceptability and preliminary efficacy of an acceptance-based, insight-oriented treatment approach for US incarcerated adults. Feasibility and acceptability will be assessed through attendance and retention throughout the intervention period. Primary outcomes include negative affect, psychological flexibility, emotion regulation, purpose in life, impulsivity, and trauma. Changes will be assessed from baseline to post-course, post-course to 6-month follow up, and baseline to 6-month follow up for all primary outcomes. Researchers hypothesize that, 1) retention rates will be similar to previous trials with 70% retention from pre- to post-course; 2) there will be significant baseline-to-post-course reductions in psychological symptoms, impulsivity, and trauma, and an increase in psychological flexibility, purpose in life, and emotion regulation; and 3) there will be significant baseline-to-6-month reductions in psychological symptoms, impulsivity, and trauma, and an increase in psychological flexibility, purpose in life, and emotion regulation.