Spouses

This project involves developing and piloting a peer-led intervention focused on posttraumatic stress symptoms for the family members and significant others of people with borderline personality disorder. The project involves collaborating with The Sashbear Foundation who will be delivering the trauma response program (TRP) that was developed by the investigative team to its network. In phase 1 of this project, the investigators will evaluate the first delivery of the TRP at The Sashbear Foundation and solicit feedback from peer-facilitators and recipients who consent to research participation. In phase 2 of this project, the investigators will evaluate the efficacy, acceptability, and safety of the delivery of the next two to four TRPs delivered at The Sashbear Foundation consisting of up to approximately 10 group members (maximum number of TRP recipient research participants in phase 2 is 40).

The goal of this clinical trial is to develop a simple, scientific, effective, and culturally adapted dyadic Acceptance and Commitment Therapy (ACT) intervention program (the ADAPT program) targeting fear of cancer recurrence (FCR) among lung cancer patients and their spouse caregivers. The study will also evaluate the feasibility, acceptability, and preliminary effectiveness of the ADAPT program. The main research questions are as follows: * Is the ADAPT intervention program feasible and acceptable for lung cancer patients and their spouse caregivers? * Compared with usual care, can the ADAPT intervention program preliminarily reduce FCR levels in both patients and their spouse caregivers? Can the program improve coping styles, illness perceptions, family functioning, and intimate relationships among both patients and their spouse caregivers? Can the program enhance psychological flexibility and quality of life (QOL) in both patients and their spouse caregivers? Researchers will compare the ADAPT intervention program with usual care to evaluate its preliminary effectiveness in reducing FCR among lung cancer patients and their spouse caregivers. Participants will: * Receive the ADAPT intervention twice during each radiotherapy and/or chemotherapy cycle, for a total of three treatment cycles (approximately 3 months); * Complete questionnaires at baseline (before the intervention), immediately after the intervention, and one month post-intervention; * Report outcomes including FCR severity, FCR triggers, psychological flexibility, illness perception, dyadic coping, family functioning, intimacy, and quality of life (QOL).