>IQ in children is a lot more reflective of environment / happenstance Yes, this study goes about measuring it instead of just shrugging their shoulders like y

>IQ in children is a lot more reflective of environment / happenstance Yes, this study goes about measuring it instead of just shrugging their shoulders like your statement is. It is correlating three variables (predictors) against IQ (the outcome variable). That is, they find that genetics, schooling, and SES all independently influence a child's IQ test score. But that school does not make the gap caused by genetics or SES better or worse.