Figure 7.
Nested factors executive function model with WAIS-IQ. Task names are abbreviated. Numbers above the ACEs for the latent variables and WAIS-IQ are the percentages of those variables accounted for by genetic and environmental influences. Numbers occluding the double-headed arrows are correlation coefficients. Correlations for components with zero or near-zero variance were not estimated. The numbers occluding arrows are standardized factor loadings. Numbers under the lower ACEs are estimates for task-specific variances. Boldface type and solid lines indicate p < .05.