The D-48 is a nonverbal analogies test used as a measure of general intelligence, widely known in Europe and other parts of the world, but not the US. The results of a study with 126 MexicanAmerican and 139 Anglo-American seventh graders are presented and these show the D-48 to be reliable, free of slope or intercept bias, a valid indicator of performance on Stanford Achievement subtests and significantly correlated with both achievement and teachers' evaluations of intelligence.
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