Interventions
Group interventions for both groups were conducted once a week for 1.5 h for 8 weeks. The group intervention protocols were designed by two professionally trained psychology graduate students supervised by the first author of this paper, who is the President of the China chapter of Association for Contextual Behavioral Science and is a professionally trained and certified counselor, trainer, and supervisor. The intervention protocols were revised and refined based on the suggestions of the relevant counselors and supervisors. Before each intervention, the first author explained and illustrated the intervention protocol and intervention points and led the interventionists to discuss the intervention process and intervention methods together. After each intervention, the interventionists reported to the first author of this paper, who provided supervision. The entire process of the group intervention was completed under the supervision of the first author.