Leslie Unger

Date of Award

January 2025

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Psychology

First Advisor

John Paul Legerski

Abstract

Mindfulness and Modification Therapy (MMT; Wupperman, 2019) is a transdiagnostic therapy that systematically integrates aspects of six empirically supported treatments for impulsive and dysregulated behavior. As such, MMT may offer an efficient approach to addressing a variety of dysregulated behaviors, thereby supporting increased safety within carceral settings and enhancing goals of rehabilitation. To date, MMT has demonstrated positive results in community settings when treating substance misuse and anger/aggression, but it has not yet been examined in a prison setting. The present research examines the feasibility and acceptability of using a 14-session version of group MMT as a voluntary treatment option with residents within a state prison in the midwestern region of the United States (U.S.). Outcomes related to various aspects of emotional and behavioral regulation were examined. Results showed high levels of retention and engagement in MMT groups, indicating it was well-received and suitable for implementation in a prison setting. Furthermore, results showed significant increases in mindfulness and distress tolerance with large and moderate effect sizes, respectively. Self-reported aggression, depressive symptoms, and experiences of urges/cravings reduced significantly, with moderate effect sizes. Qualitative feedback indicated participants felt empowered by the changes they achieved through MMT and appreciated engaging in a group setting. In sum, MMT shows much promise as a viable and effective treatment option for dysregulated behaviors among prison residents.

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