Fig. 2.

Partial plots showing relationship between change in VIQ and Time 1 test scores included in the third step of the hierarchical multiple regression analysis (see Table 2). Partial plots are shown for the Step 3 regression for the change in VIQ (first line of Table 2). They show the residuals of the dependent variable (change in VIQ) and each of the independent variables, when all are regressed separately on the remaining independent variables. These plots demonstrate that the effects are not driven by outlier effects.