from South Africa are exclusively non-White and non-Hispanic. They also come from more vulnerable, less stimulating environments (Adnams et al., 2007) and are physically smaller (May et al., 2007) than subjects from the U.S. Future studies with different samples will help clarify these results. Supplemental analyses without the South African cohort yielded similar findings, although the classification accuracies, while statistically significant, were lower for the first analysis (FAS and CON) and higher for the second analysis (AE/Non-FAS and CON).
