Article ID: 24-010
This study aimed to develop a self-help Acceptance and Commitment Therapy (ACT) program to support mental health among university students and examine its feasibility. It employed a dyschronous between-participant multiple-baseline design. The program included four video clips and a 20-day homework component. Furthermore, the ACT-related process indices, symptoms, and health-related quality of life (QOL) were measured nine times. Three of the five participants completed the program. The results demonstrated that although the effects were clinically non-significant, the program offered mid- or long-term improvements in health-related QOL. Regarding the ACT process indices, although improvements may tend to regress, the program may influence these changes for at least partial processes as expected. Additionally, the results of these chronological changes indicate that changes in process variables may mediate outcome improvements. The factors contributing to dropout were examined, and recommendations for refining the program were proposed based on the results.