Chunk #42 — Results — Question 3: Can the Relationship Between Behavioral Disinhibition and Response Inhibition Be Explained by Shared Genetic Factors?
The genetic correlation at age 17 was essentially the same as that at age 12 (rA = −.61; see Figure 2) even though the relative contribution of genetic factors to individual differences in behavioral disinhibition was somewhat smaller than at age 12 (.43 vs. .59). Moreover, as with age 12 behavioral disinhibition, the phenotypic correlation of −.41 between behavioral disinhibition and response inhibition at age 17 was almost completely due to the genetic correlation (−.40=−.61×.43*.98), while the environmental correlation made a minimal contribution (−.01=−.11×.17*.02). Hence, despite modest differences in the genetic and environmental etiology of the individual latent constructs at ages 12 and 17, the genetic association between behavioral disinhibition and response inhibition was quite comparable at the two points in development.
