The paper is here in PDF format. We should try to increase overall educational achievement, even if it does not close gaps.

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The Rhetoric and Reality of Gap Closing
When the “Have-Nots” Gain but the “Haves” Gain Even More
Stephen J. Ceci and Paul B. Papierno
Cornell University

Many forms of intervention, across different domains, have the surprising effect of widening preexisting gaps between disadvantaged youth and their advantaged counterparts—if such interventions are made available to all students, not just to the disadvantaged. Whether this widening of gaps is incongruent with American interests and values requires an awareness of this gap-widening potential when interventions are universalized and a national policy that addresses the psychological, political, economic, and moral dimensions of elevating the top students—tomorrow’s business and science leaders—and/or elevating the bottom students to redress past inequalities and reduce the future costs associated with them. This article is a first step in bringing this dilemma to the attention of scholars and policymakers and prodding a national discussion. …

It turns out, however, that when these gap-narrowing interventions are universalized— given not only to the group of children who most need assistance but also to the more advantaged group (regardless of whether the latter is identified as White, rich, high ability, etc.), a surprising and unanticipated consequence sometimes occurs: The preintervention gap between the disadvantaged group and the advantaged group is actually widened as a consequence of making the intervention universally available. This is because, as we will show, although the disadvantaged children who most need the intervention do usually gain significantly from it, the higher functioning or more advantaged children occasionally benefit even more from the intervention. The result is increased disparity and a widening of the gap that existed prior to universalizing the intervention. This has led a prominent intervention researcher to bemoan the major drawback of universalization that “makes nice children even nicer but has a negligible effect on those children at greatest risk” (Offord, 1996, p. 338).