Project Body Neutrality is a digital, self-guided SSI that teaches adolescents about body neutrality. It contains self-reflection exercises, vignettes from fictional peers, and psychoeducation that support users in understanding why body positivity may be a difficult mindset for some individuals to obtain; additional self-reflection exercises and vignettes that present body neutrality as a well-rounded alternative to body positivity; exercises that culminate in a user-generated list of activities that their body allows them to enjoy as well as statements they can use to counter negative thoughts about their body; writing prompts where users provide advice based on body neutrality principles to fictional peers struggling with their body image; and an opportunity to contribute their advice or reflections anonymously to a lab-run social media campaign as a form of body neutrality advocacy. See all materials for this intervention here: https://osf.io/7qtuj.

The Sharing Feelings SSI is a digital, self-guided SSI that is structurally similar to Project Body Neutrality, but it is designed to mimic supportive therapy (ST). The goals of the ST intervention are to encourage participants to identify and express feelings to close others; the intervention does not teach or emphasize specific skills or beliefs. The ST-SSI is designed to control for nonspecific aspects of intervention, including engagement in a computer program, reading and writing exercises, and vignettes from fictional peers. See all materials for this intervention here: https://osf.io/u4axs/.

Online, 30-minute self-guided intervention for youth ages 13-17

A 10-item questionnaire designed to assess the range and severity of features associated with a diagnosis of eating disorder. The original measure's factor structure has failed to replicate across many samples, especially for diverse populations. This version has achieved strict invariance by gender and race/ethnicity. Higher global scores indicate greater eating disorder severity (primary outcome). Outcomes for the three subscales (Dietary Restaurant, Preoccupation with Eating Concern, and Shape/Weight Overvaluation) will also be reported. Each item is on a 0 to 6 scale and the scores are computed as means.

A 13-item questionnaire designed to assess depressive symptoms in youth. Total scores range from 0 to 26, with higher scores indicating greater depression severity (primary outcome).

Asks respondents to rate four statements reflecting their sense of hopelessness from 0 (Absolutely Disagree) to 3 (Absolutely Agree). Total scores range from 0 to 12, with higher scores indicating greater levels of hopelessness.

Asks respondents to rate twelve items from 1 (Never True) to 7 (Always True). Total scores range from 12 to 84, with higher scores indicating greater body image flexibility.