216 eligible adolescents, along with one accompanying parent, will complete a Qualtrics baseline battery via a secure video-conference platform. This battery will be followed by a 3-week (ESM) period. In preparation for this 3-week period, adolescents with a personal smartphone will be assisted in downloading the ecological sampling method (ESM) app during the initial lab session. The participants will then receive an ESM tutorial, and a research team member will review each survey question with the adolescent to ensure comprehension. At the end of the initial session, participating families will schedule a second, brief meeting with the lab to help the adolescent set up the online intervention, which will be completed after the ESM period.~During the ESM period following the baseline battery, adolescents will be prompted to complete the same 2-minute, 8-item survey 5 times per day for 21 days, via a smartphone-based, encrypted data collection app (LifeData). Notifications to complete surveys will occur every 2-3 hours. Responses will be deemed valid if completed within 2 hour of notification, ensuring at least 1-hour lags between surveys.~Once the 3-week ESM period is complete, adolescents will be randomly assigned to receive 1 of 3 web-based single session interventions (SSIs) at a second secure video conference session. The second video conference session will be brief and is meant to help adolescents access the online intervention, which they will complete by themselves. This second session will take place within 2-3 weeks after the ESM period. Immediately pre- and post-SSI, adolescents will complete a limited number of self-report questionnaires by themselves to index shifts in proximal outcomes.~The adolescent and parent pairs will, on their own, complete follow-up assessments at post-intervention. These assessments are abridged versions of the baseline battery. To enable longitudinal analysis of outcome trajectories, adolescents and parents will complete online follow-up questionnaires (including subjective reports of clinical and functional outcomes) 3, 6, 12, 18, and 24 months post-intervention. All follow-up surveys will be completed via Qualtrics, through personalized links sent to the family.~All families will be debriefed by email, and the intervention SSI condition assignment will be revealed, after 24-month follow-up is complete. At this time, adolescents will be offered the opportunity to remotely complete the SSIs they did not originally receive.
We will recruit 216 subjects meeting the eligibility criteria. After completing a baseline battery session via secure video conferencing and 3-week phone survey period, adolescents will be randomly assigned to receive 1 of 3 web-based single session interventions (SSIs) at a second secure video conference session. This second session for the intervention will take place within 2-3 weeks after the phone survey period. Immediately pre- and post-SSI, adolescents will complete a limited number of self-report questionnaires to index shifts in proximal outcomes. Participants, both adult and youth, will complete additional follow-up questionnaires 3, 6, 12, 18, and 24 months post-intervention. Participants will complete the intervention, including the pre- and post- SSI questionnaires, and follow-up surveys on their own.