After tabulation and discussion of racial differences in intelligence found by previous workers, author gives results of testing 2457 public school children of Tennessee, Louisiana, and California with Goodenough Intelligence Test for Young Children, which is independent of language. A number of racial stocks were included: Orientals, Spanish-Mexican, Jews, Indians, Negroes, and Europeans of various nationalities. The distribution of IQ's shows that the South Europeans and Negro groups rank very much below American children and those of North European stock. The rank-order of various nationality-groups corresponds very closely to that found by means of other intelligence tests. In order to be fair to foreign groups, no children from schools in superior residential districts were tested. Bibliography of 46 titles. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
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Florence L. Goodenough (1926) studied this question.