Chunk #36 — Results — Question 1: What Are the Similarities and Differences in the Structure and Etiology of Behavioral Disinhibition at Two Points in Adolescent Development? — The behavioral disinhibition factor
respectively). Substance use and novelty seeking made relatively smaller contributions (though both statistically significant at p < .05) at this young age. On the upper left side of Figure 1, the decomposition of the variance in behavioral disinhibition into its genetic and environmental components is illustrated. Results suggest that the behavioral disinhibition factor was highly heritable, with 59% of the variance explained by genetic influences. Shared environmental factors accounted for only a modest portion of the variance (27%, ns), and the remaining 14% was explained by significant nonshared environmental influences. With the exception of ADHD, the residual, measure-specific variances were also primarily genetically driven.
