Veterans experience high rates of posttraumatic stress disorder (PTSD) and depression, which are frequently comorbid and result in difficulties with psychosocial functioning substantially greater than either disorder alone. Functioning difficulties in Veterans have not been adequately addressed by most existing psychotherapies for PTSD and depression because they often focus on symptom improvement and are highly resource-intensive, requiring the training and time of skilled providers. To address this gap, mobile health (mHealth) apps can serve as a widely accessible, standalone or adjunctive intervention to target psychosocial functioning among Veterans with comorbid PTSD and depression. This study focuses on the evaluation of a self-guided mHealth intervention based on Skills Training in Affective and Interpersonal Regulation (STAIR), an evidence-based psychotherapy that explicitly targets functioning improvements and also alleviates PTSD and depression symptoms among trauma survivors. As part of the intervention, real-time assessment (i.e., ecological momentary assessment and passive sensing) will be incorporated to support Veterans in monitoring their functioning, symptoms, and potential benefits from STAIR. The primary goal is to determine the feasibility and acceptability of this intervention (self-guided STAIR Coach with real-time assessment).
