“…Additionally, there is likely a genetic effect; however the magnitude of the genetic effect on child mental abilities or achievement, has been shown to vary by the SES of the population being assessed, with genetics playing a much smaller role in disadvantaged, low SES populations, presumably because genetic effects are not fully realized until sufficient cognitive stimulation is present in a population (Harden, Turkheimer, & Loehlin, 2007; Turkheimer, Haley, & Waldheimer, 2003). Likewise several recent studies documented that associations between adverse perinatal outcomes such as intrauterine growth restriction and child cognition were not always apparent in low SES population (Drews-Botsch et al, 2011; Malacova et al, 2009). Finally, beyond population-SES factors, specific neighborhood factors that influence livability, cohesiveness, and safety which are certainly related to the SES of a population might additionally impact child cognitive performance through a other relationships, particularly post-natal environmental factors.…”