What this trial measures

• Subcomponents of Affect ScaleBaseline, bi-weekly for 6 weeks (3 time points)

  The Subcomponents of Affect Scale (SAS) is an 18-item measure of affect, divided into nine positive and nine negative adjectives. Positive subscales include calm, well-being, and vigor, while negative subscales include depression, anxiety, and anger. Participants rate each adjective from 0 (not at all accurate) to 4 (extremely accurate) based on their feelings over the past two weeks. Total scores for positive and negative affect are summed from their subscales.

• Implicit Theories of EmotionBaseline and 6 weeks post-baseline

  Implicit theories of emotion were assessed using the Implicit Theories of Emotion Scale, adapted from Dweck's Implicit Theories of Intelligence framework. The scale includes four items assessing beliefs about whether emotions are malleable (incremental) or fixed (entity). Participants rate each item on a 6-point scale from 1 ("Strongly disagree") to 6 ("Strongly agree"). The two entity items are reverse-scored, and all items are averaged to create a single score ranging from 1 to 6, with higher scores indicating stronger endorsement of an incremental (malleable) theory of emotion.

• LonelinessBaseline, bi-weekly for 6 weeks (3 time points)

  The UCLA 3-Item Loneliness Scale is a brief measure assessing subjective feelings of loneliness and social isolation. Participants rate each item on a 3-point scale, from 1 (hardly ever) to 3 (often), with higher scores indicating greater loneliness.

• Perceived CohesionBaseline, 6 weeks post-baseline

  The Perceived Cohesion Scale measures a sense of belonging and morale within a community using a Likert scale from 0 (strongly disagree) to 10 (strongly agree). For our purposes, we use a single-item version: "I see myself as part of the campus community."

• Closeness to UniversityBaseline and 6 weeks post-baseline

  Closeness to one's university was assessed using a modified single-item Inclusion of Other in the Self measure. Participants were shown seven pairs of increasingly overlapping circles and asked, "Which picture best describes your relationship with your university?" Responses range from 1 to 7, with higher scores indicating greater perceived closeness to the university.

• Perceived Social Support (PSSS-3)Baseline, bi-weekly for 6 weeks (3 time points)

  Perceived social support was assessed using a 3-item short form based on the ACO (PSSS-A6) and adapted from the Multidimensional Scale of Perceived Social Support (MSPSS). Participants rate each item on a 7-point scale from 1 ("Very Strongly Disagree") to 7 ("Very Strongly Agree"). Total scores are summed, yielding a range from 3 to 21, with higher scores indicating greater perceived social support.

• Mindfulness (Mindful Attention Awareness Scale)Baseline and 6 weeks post-baseline

  Mindfulness was assessed using a 5-item short form of the Mindful Attention Awareness Scale (MAAS), modified to assess experiences over the past two weeks. Participants rate each item on a 7-point scale from 0 ("Not at all") to 6 ("Very much"). Items are averaged to create a total score ranging from 0 to 6, with higher scores reflecting lower mindfulness. For interpretability in analyses, this score is reverse-scored so that higher values indicate greater mindfulness.

• ResilienceBaseline, 6 weeks post-baseline

  The Brief Resilience Scale (BRS) is a 6-item measure of stress recovery, rated from 1 (strongly disagree) to 5 (strongly agree). Higher scores indicate a stronger ability to "bounce back" after setbacks.

• Flourishing ScaleBaseline, 6 weeks post-baseline

  The Flourishing Scale is an 8-item measure of psychological well-being. Respondents rate items from 1 ("Strongly disagree") to 7 ("Strongly agree"), yielding a total score range from 8 to 56. Higher scores indicate greater well-being and flourishing.

• Retention / Enrollment IntentionBaseline, 6 weeks post-baseline

  Retention intention was assessed using 2 items evaluating students' likelihood of continuing their enrollment. Participants respond to "How likely are you to stay enrolled next quarter/semester?" on a 5-point scale from 1 ("Very unlikely") to 5 ("Very likely"). A second item asks, "How often have you considered leaving your college/university in the past semester?" rated from 1 ("Never") to 5 ("Very often"). Higher scores on the first item indicate greater intention to persist, while higher scores on the second item indicate greater consideration of leaving.