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" At age 10, Negro children of the lowest economic group are about a year behind the white lowest economic group in reading, and 5 points lower in IQ. Both groups have improved markedly in the last generation. The average IQ score of white children of unskilled... "
Bulletin - Page 21
by United States. Office of Education - 1963
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Statistics of Land-grant Colleges and Universities, Issues 4-5

United States. Office of Education - 1963 - 396 pages
...et al. Intelligence and Cultural Differences. Chicago : University ef Chicago Press, 1951. p. 112. reading, and 10 points lower in IQ ratings.10 At age...improve steadily with length of residence in New York or Philadelphia.13 This trend is statistically significant and continuous. Such improvement in educational...
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