A study of natio-racial mental differences / by Nathaniel D. Mttron Hirsch.

Hirsch, Nathaniel David Mttron, 1896-

Date:: [1926], ©1926

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Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: A study of natio-racial mental differences / by Nathaniel D. Mttron Hirsch. Source: Wellcome Collection.

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304 GENETIC PSYCHOLOGY MONOGRAPHS TABLE 20 Percent of each National group at or below 79 I. Q. Swedes ^ 5.6 English 7.9 Polish Jews 8.0 Germans 9.5 Russian Jews 9.9 Lithuanians 10.0 Americans 11.1 Irish 14.0 British Canadians 14.8 Russians 17.8 Poles 22.9 Greeks 29.6 Italians 31.1 French Canadians 37.0 Negroes 39.8 Portuguese 43.7 Figure 4 presents per cent of each national group receiving an I. Q. at or below 79, Another valuable comparison is to present the per cent of each National group at or above the American I. Q, average 98.3. Table 21 below exhibits such a comparison. TABLE 21 Percent of each group at or above American average. Polish Jews 70.7 Swedes 62.1 English 59.2 Russian Jews 52.0 Lithuanians 51.7 Germans 50.0 Irish 44.4 British Canadians 35.5 Poles 25.1 Greeks 24.8 Russians 23.3 French Canadians 22.2 Negroes 20.5 Italians Portuguese 12.8 Figure 5 presents per cent of each national group receiving an I. Q. at or above the American L Q. average.