The online outreach program focused on four key areas of mental health resilience-building: dealing with stress, decreasing self-criticism, improving self-care and help-seeking behaviours, and enhancing social connections and social support. Using videos, interactive infographics, guided audio recordings, and podcasts, students were provided with clear descriptions of each area of mental health resilience as well as a variety of evidence-based strategies specifically targeting one or more of these areas. A first video was sent to students describing the online program, its overall focus, and how to access the skills-based strategies on the website's interactive resource library. Two subsequent videos then were sent to (a) help students with problem-solving for common challenges to strategy practice, and (b) maintain long-term strategy practice habits. To assess differences in terms of preference for deliverer, this video series was delivered by undergraduate students (i.e., peers).

The program focused on four areas of mental health resilience-building: dealing with stress, decreasing self-criticism, improving self-care and help-seeking behaviours, and enhancing social connections and social support. Using videos, infographics, guided audio recordings, and podcasts, students were provided with clear descriptions of each area of mental health resilience as well as a variety of evidence-based strategies specifically targeting one or more of these areas. A first video was sent to students describing the online program, its overall focus, and how to access the skills-based strategies on the website's interactive resource library. Two subsequent videos were then sent to (a) help students with problem-solving for common challenges to strategy practice, and (b) maintain long-term strategy practice habits. To assess differences in terms of preference for deliverer, this video series was delivered by mental health service providers.

3 videos and a resource library disseminated over the course of 9 weeks.

The Perceived Stress Scale (PSS) is a widely used self-report measure of individuals' perception of stress. This measure contains 10 items in which participants indicate their experience of stress on a 5-point Likert scale (0 = never to 4 = very often). Items were adapted to reflect experiences during the past week and include statements such as "In the past week, how often have you felt difficulties were piling up so high that you could not overcome them?" Ratings were averaged across items such that higher scores represented greater perceived stress. The PSS has good reliability (Cronbach's α = .89), construct validity, and predictive validity with reports of psychological and physical symptoms. In the present study, the PSS had good internal consistency with Cronbach's alphas at T1, T2, and T3 were .86, .82, and .85, respectively.

The Coping Self-Efficacy Scale (CSES) is a measure of one's confidence in effectively engaging in coping behaviors in the face of challenges. This measure contains 26 items in which participants indicate confidence in their coping strategies when it comes to handling challenges and stressors on an 11-point Likert scale (0 = cannot do at all to 10 = certain can do). The CSES states "When things aren't going well for you, or when you're having problems how confident or certain are you that you can do the following:" and include statements such as "find solutions to your most difficult problems" and "see things from the other person's point of view during a heated argument." Higher scores on the CSES represent higher coping-self efficacy. The CSES has good internal consistency (Cronbach's α = .91), and test-retest reliability. In the present study, the CSES had good internal consistency, with Cronbach's alphas at T1, T2, and T3 being .92, .93, and .94, respectively.