FIGURE 2.
(a) Conceptual and (b) statistical models illustrating hypothesized conditional direct and indirect effects for left caudate FA (L CN FA; X), cognition composite score (M), childhood literacy score (W) and language composite score (Y). a1, effect of X on M; a2, effect of W on M; a3, interaction effect between X and W; b, effect of M on Y; c1, effect of X on Y; c2, effect of W on Y; c3, interaction effect between X and W; iY and iM, regression constants; L CN FA, left caudate FA; M, mediator; W, moderator; X, predictor variable; Y, outcome variable