Randomized Controlled Trial of Project Body Neutrality

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 three statements from 1 (Definitely False) to 8 (Definitely True). Total score ranges from 3 to 24, with higher scores reflecting greater perceived ability to identify goal-oriented routes.

Asks respondents to rate seven statements from 1 (Strongly Disagree) to 5 (Strongly Agree). Total scores range from 7 to 35, where higher scores indicate greater appreciation for body functionality.

Asks respondents to rate six items from 1 (poor body image state) to 9 (favorable body image state). Total scores range from 6 to 54, where higher scores indicate a more favorable body image state.

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.

Asks respondents to rate three items from 1 (Almost Never) to 6 (Almost Always). Total scores range from 3 to 18 with higher scores indicating greater nonjudgmental acceptance. We adapted the items of this subscale to ask specifically about nonjudgmental acceptance of one's physical appearance.

Asks respondents to rate thirteen items from 1 (Never) to 5 (Always). Total scores range from 13 to 65 with higher scores reflecting a greater severity of muscle dysphoria symptoms.

Asks respondents to rate seven statements regarding intervention acceptability and feasibility; it also includes open-ended items that invite respondents to share what they liked and/or would change about the intervention. The seven statements are rated from 1 (Really Disagree) to 5 (Really Agree). Total score ranges from 5 to 35, with higher scores indicating a more positive evaluation.

Respondents are asked two questions about mental health treatment seeking in the past three months: "In the past 3 months (since completing the first survey for this study), did you seek out any new support for depression or mood problems?" and "In the past 3 months (since completing the first survey for this study), did you seek out any new support for an eating disorder or body image problems?"