Figure 5.

Age‐related changes in heritability for younger and older children. Variance component estimates are calculated using the AE model, since the shared environment component did not significantly affect results. Estimates of variance components were computed separately for younger children (aged 5–11) and for older children and adolescents (aged 12–19). Columns (a) and (b) show areas that are significantly heritable for younger (a) and older (b) age groups. Column (c) is a map of differences in heritability, created by subtracting the values for the younger group from those of the older group. Arrows indicate regions in which heritability changes between age groups. Numbers to the left of the scale bar indicate degree of statistical significance. Numbers to the right of the scale bar indicate the magnitude of the difference in heritability: light green, yellow, and red indicate heritability increasing with age; dark green, blue, and purple regions indicate decreasing heritability. A FDR threshold of q = 0.05 was applied to significance maps.