Heritability estimates for the six GMM trajectories are presented in Figure 3. These results suggest that heritability increases in a stepwise fashion up the trajectory ranks—the severity and heritability of the trajectories graduate in tandem. Presented in Figure 3 are these estimates of A, which monotonically increase from 5% to 42%. Conversely, the estimates of E monotonically decrease from 93% to 43%. The estimates of C were low across all trajectory groups, ranging from 0–4%.
