Promoting HIV self-testing via emotional support messages among men who have sex with men in China.

Objective: Since negative emotions were identified as barriers to HIV self-testing (HIVST), offering emotional support may promote this behavior. This study examined whether the socio-affective and reappraisal components of emotional support messages differ in affecting one's attitude towards and intention to conduct HIVST via response efficacy and self-efficacy.

Method: A between-subject online experiment was conducted with 309 Chinese men who have sex with men. Participants were randomly assigned to one of three conditions: no support, only reappraisal information, socio-affective and reappraisal information both provided.

Results: Emotional support only worked for those completing HIVST in recent three months. The reappraisal information enhanced their response efficacy and self-efficacy, but only self-efficacy was positively related to one's attitude towards and intention to conduct HIVST. The message including socio-affective and reappraisal components directly improved their HIVST-related attitudes.

Conclusion: Emotional support presents an approach to promoting HIVST. The socio-affective and reappraisal information function differently on their response efficacy, self-efficacy, attitude, and intention.

Practice Implications: This study provides implications on how to design messages promoting HIVST for health campaigns and AI-based healthcare technologies. Reappraisal information should be offered to enhance one's response efficacy and self-efficacy. Messages should address both socio-affective and reappraisal needs of individuals.