Chunk #35 — 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
Results of the Wave 1 multivariate model are shown in Figure 1 (note that, to avoid redundancy, we do not present here a model that includes only the behavioral disinhibition factor, but it results in quite similar parameter estimates). This model was compared with a fully saturated model, which freely estimates twin means, variances, and covariances, to judge the fit of the hierarchical model. The chi-square difference test showed that the model provides a good fit to the data: χ2(200, N = 293) = 259.81, p = .003, RMSEA = .045. The relationship between our four component measures and the latent behavioral disinhibition factor is illustrated by the pattern of factor loadings in Figure 1. At age 12, the behavioral disinhibition latent factor was dominated by individual differences in the conduct disorder and ADHD composites (λs = .69 and .85, 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
