marginally significantp = 0.06
Preliminary Analyses Parental background variables (i.e., parents’ age and education at the time of their child’s birth) and adolescent background variables (i.e., age at the adolescence assessment and intelligence scores measured at 13.5 years of age) did not correlate with any of the dependent variables, r s < 0.20, p s > 0.15, except for mother’s years of education, which had a marginally significant correlation with adolescents’ N2 amplitude at age 17 years, r = −0.25, p = 0.06; therefore, it was controlled in further analyses.