Date of Award


Degree Name

Doctor of Philosophy



First Advisor

Dr. Galen Alessi

Second Advisor

Dr. Amy Naugle

Third Advisor

Dr. C. Richard Spates

Fourth Advisor

Dr. Roberto Flachier


This study investigated the efficacy of 10-weeks of Behavioral Activation (BA) in the treatment of co-morbid Major Depressive Disorder (MDD) and Post-traumatic Stress Disorder (PTSD) in six adults using a nonconcurrent multiple baseline across participants design. This study is an attempt to expand empirical knowledge regarding BA, co-morbid PTSD and MDD, and the treatment outcome research specifically relevant to these co-morbid diagnoses. All participants met full DSM-IV criteria for both MDD and PTSD at the outset of the study. Duration of baseline for each subject varied and ran for 1, 2, 3, 4, or 5 weeks. Self-report data were gathered at each session and again at mid-point between each session. At the post-treatment assessment sessions, self-report and observer rated data indicate that three participants no longer met criteria for either MDD or PTSD and an additional participant no longer met criteria for MDD. It is argued that BA may be an effective treatment for co-morbid PTSD and MDD and the theoretical rationale is provided.


5th Advisor: Dr. Jeffrey Porter

Access Setting

Dissertation-Open Access