There was a marginal difference between the developmental trajectories of the intermediate paternal risk group and the paternal AAB risk group, χ2(1, N = 208) =3.66, p= .056. The trajectory for the intermediate paternal risk group was characterized by a higher intercept (M = 24.26 µV, SE = 1.38) and slope (M= −0.57 µV/year, SE = 0.17) than that of the paternal AAB risk group. Figure 4b illustrates the differences in intercept between these groups in the range observed. These differences were statistically significant between the ages of 17.63 and 20.15 years. The low- and intermediate-risk groups did not have significantly different trajectories, χ2(1, N = 287) = 0.41, p= .521.3
