Educational attainment mediation model.

PGS = polygenic risk score. Circles represent random intercept factor scores. The first five genetic principal components and sex were included alongside the PGSs as predictors of the random intercept factor scores and educational attainment in adulthood. Covariate paths, covariances between predictor variables, covariances between random intercepts, variances/residual variances, and mean structure omitted from figure for clarity of presentation. Random intercepts represented via random intercept factor scores from the initial, unconditional random intercept models.