Procedure
depression, anxiety
APPENDIX
During Visit 1, participants first underwent the ADIS-5 clinical interview. Eligible participants then completed initial self-report and performance-based neuropsychological measures in a counterbalanced fashion to rule out order effects. Next, they were randomized to MEMI or SMP with the Microsoft Excel randomization function programmed into Qualtrics with the insertion of the appropriate treatment video played toward the end of Visit 1 after completing all pretreatment assessments. Experimenters/assessors were blinded to treatment conditions, that is, the treatment assignment was concealed from them during all study visits. During Visit 1, the experimenter left the physical room (pre-pandemic) or instructed participants to mute/switch off their Zoom audio and video before they clicked on the Qualtrics link to play the appropriate treatment video (during the pandemic). Participants installed the PACO app programmed with the MEMI or SMP on their smartphones, and the experimenter demonstrated how to use it. Participants were informed that they would be prompted five times daily (about 9 am, noon, 3 pm, 6 pm, and 9 pm) for the next 14 days. The prompts were adjustable based on participants’ schedules. Responses on state depression, anxiety, and mindfulness pre- and post-MEMI or SMP induction had to be keyed in within 2 h of prompting to be valid. The prompts would instruct them to engage in mindfulness or self-monitoring strategies depending on their condition. After 14 days, all participants returned to the laboratory posttreatment and at 1MFU to complete the self-report scales and neuropsychological tests. Participants were compensated by credit hours, money, or a combination of both (Appendix A in the Online Supplementary Material). The research team conducted a seventh-day compliance check and reinvited participants who passed the compliance check.