twins in lower SES families, greater variance in IQ was accounted for by the environment rather than by genetics, whereas among higher SES families, greater variance was accounted for by genes, leading them to propose that SES modified the heritability of child IQ. Extending this to our study, given that there are more children with lower SES in H/I group, the association of SES with neurocognitive functioning may be more evident among H/I children.
