&gt; Being rich or poor has no bearing on someones ability to score highly on any standardized test.<p>Being rich or poor has a strong, fairly direct, causal relationship to being relatively free from or subject to various environmental and other conditions -- both proximate to the time of the test and at earlier developmental stages -- that have adverse impacts on ability to score highly on any standardized test.<p>(For a dramatic demonstration that is in the news right now see Flint, Michigan.)