Although the above findings indicate that parent–child conflict moderates only the shared environmental component of variance, there is one key consequence of the absolute increase in C for the genetic (and non-shared environmental) components of variance: namely, when A, C and E estimates are considered relative to one another, A appears to be proportionally more important to CP at low levels of conflict than at high levels of conflict (even as its absolute contribution remains unchanged). To empirically evaluate this possibility, we computed standardized estimates of A at the lowest and highest levels of conflict in the best-fitting model. We then computed the difference score between these standardized estimates of A, as well as the 95% confidence interval (CI) of that difference score2. Difference score CIs that did not overlap with zero would indicate that the two estimates were significantly different from one another (Cumming & Finch, 2005; Knezevic, 2008), even though the absolute or unstandardized contribution of A remained constant. Results of these post hoc analyses are presented in Table 4. As seen there, A accounted for 53.5% of
