Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Factor structure, loadings and ACE estimates of (a) reading ability, (b) mathematics, (c) gf and (d) processing speed. A = additive genetic variance; C =shared environmental variance; E = non-shared environmental variance; All paths are standardized.
