Lester B. Pearson

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Corman and Escalona's scales for Object Permanence and Spatial Relationships were readministered to 71 severely and profoundly mentally retarded individuals five years after the last previous administration of the scales. Gains in mean scores were small but statistically significant for both scales. In addition, significantly more subjects gained than lost(More)
Howard's Maze Test and Maw and Maw's Which-to-Discuss Test were individually administered to 25 educable mentally retarded junior high school students. Although the internal consistency of both tests was acceptably high (.81 to .90, respectively), scores were essentially unrelated to a host of demographic and other types of variables. Moreover, the(More)
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