Figure 2 illustrates the change in the standardized variance components for Internalizing from the full moderation model with Marital Quality. As shown, the standardized variance components for Internalizing vary as functions of Marital Quality (shown as z-scores from −2 to +2). As Marital Quality increased, genetic effects and non-shared environmental effects decreased in importance in the etiology of Internalizing, whereas shared environmental effects increased in importance.
