Unstandardized variance estimates for the full moderation model and best-fitting model (i.e., drop quadratic shared and nonshared environmental moderators) in post-hoc analyses that excluded andrenarcheal twins ages 6-7. a = additive genetic effects, c = shared environmental effects, e = non-shared environmental effects. Results indicated significant linear moderation of non-shared environmental effects and significant linear and quadratic moderation of genetic effects on disordered eating. Standardized heritability estimates were 17% in ages 8-9, 33% in ages 10-12, 63% in early puberty, and 51% in mid-to-post puberty.