How specific are the relationships between eating disorder behaviors and perfectionism?

• Neuroticism mediated most eating disorder and perfectionism associations.
• Neuroticism did not mediate restriction and achievement striving perfectionism.
• Conscientiousness did not mediate eating disorder and perfectionism associations.
• Doubts about actions and conscientiousness moderated body dissatisfaction.

Perfectionism is associated with several mental disorders, including depression, anxiety, and eating disorders. The goal of this study was to test the specificity of the associations between perfectionism facets and eating disorder behaviors, by examining whether neuroticism and conscientiousness mediated or moderated associations between these variables. Participants from a representative community sample (N = 407; 47% female) completed questionnaires assessing perfectionism, neuroticism, conscientiousness, and eating disorder behaviors. Neuroticism partially mediated associations between binge eating, restraint, body dissatisfaction, and maladaptive perfectionism facets. Neuroticism did not mediate associations between restriction and achievement striving perfectionism facets. Conscientiousness did not mediate any associations between perfectionism facets and eating disorder behaviors, yet Doubts about Actions interacted with conscientiousness to predict body dissatisfaction. Results indicate that neuroticism is key for understanding general risk factors that lead to myriad internalizing disorders, whereas maladaptive perfectionism has limited usefulness as a specific risk factor for eating disorder behaviors. Nevertheless, there is a unique association between dietary restraint and achievement striving dimensions of perfectionism that cannot be explained by higher-order personality traits.