<p>Marylandmom - the stats are well researched and easily borne out. They do not predict achievement on an individual basis: you can not say how well child x will perform based on x's parental income. But they are incontrovertable on a group, statistical basis. Plot out all SAT scores on a graph related to parental income, and you will get a straight, linear progression; as family income rises, so do the scores.</p>
<p>So yes - using SAT's as a screening devise is a way to control for income & need. The higher the bar for admission in terms of SAT score, the higher the average family income of admittees. There is a much smaller percentage of students needing financial aid coming from the the group of SAT scorers in the 1500-1600 range than, for example, in the 1200-1300 range. </p>
<p>The ONLY way around this would be to reduce reliance on SAT's or to deviate from need-blind to need-aware to create a recalculated SAT. In other words, to use a formula that adds in SAT points based on economic status. (Which is kind of how the UC admission works, though the extra points are not added directly to SAT - but that in turn is why UCLA has so many more kids qualifying for Pell grants than Harvard).</p>
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<p>As to the purported 5% of students with family incomes in the $40-$100K range, the reason for that figure is not necessarily admit rate, but the realities of financial aid. Families with incomes under $40K are more likely to get close to a full ride with financial aid, and they will qualify for and need aid at both public and private colleges; the private colleges are likely to be more generouse with grant aid, so those kids, when admitted to top colleges, also have a financial incentive to attend: the private colleges end up costing less than or equal to the public schools. </p>
<p>In the $40-$100K range, the situation changes: as the income rises, there is less likelihood that the financial aid will reduce the cost of a private education to the equivalent of an in-state public. However, in that income range, families do not have a lot of discretionary income, and are less likely to have significant savings to draw on for college. Any kid who can get into Columbia can also get into their state university - the state university is also likely to offer merit aid, thus increasing the differential in costs. So the choice becomes between a private college the parents cannot reasonably afford, and the public institution that they can easily afford. It's a no-brainer for most: kid goes to state U. After all, if the kid's so smart, the parents know s/he will do just fine at Berkeley or UT Austin or wherever, and it makes more sense to conserve resources for grad school.</p>
<p>Above $100K we start to reach the range of families who can afford the private colleges without impacting significantly on their lifestyle -- and, in most cases, families who also have been able to put away significant savings to fund college. So the financial differential is not important - but at the same time prestige is far more important, because the upper class and wealthy are surrounded by peers who place high value on prestigious, private education. So the percentage of admitted students in upper ranges who actually attend is going to rise dramatically, especially since the wealthy student is not comparing costs with the state u any more, but now comparing the cost between Columbia and whatever private college or LAC is the safety. </p>
<p>So what I am saying is that the rate of attendance does not necessarily reflect rate of admittance -- rather, it reflects the combination of differential admit rates and differential yield rates among groups.</p>