TABLE 3.-Rough or approximate comparability of scales for the measurement of natural intelligence IV V 18 up..... Above 130. Above 90.. Above 1.50 280-412 200-219 19. 6-26.0 4.1 4.5 1. 1 55. 0 Superior.... B 16.5-17.9 120-130.... 85-89. 1.25-1.50...230-279 170-199 17. 1-19.5 8.0 8.8 2.9 28.4 geant. 0.6 Average ser College education First-class executive material. age. Average..... High aver C+ 15.0-16.4 110-120.... 81-84. 1.05-1.25.-190-229 140-169 15. 1-17. 0 15. 016. 2 7.3 12. 5 0.95-1.05.130-189 100-139 13. 3-15. 023.823.4 26.6 3.3 5.7 Average privvate. poral. 2.0 Average cor Approximate military value Black rule suggests line of demarcation, so far as individual and family stock intelligence (but not necessarily other physical or personal qualities) is concerned, between immigrants who probably would and those who would not contribute to the racial value of future American family stocks. Reference: Memoir XV, National Academy of Sciences, "Psychological Examining into United States Army," edited by Robert M. Yerkes. For page numbers see rank of each column. tions. In chart 7 the longer lines opposite the name of the particular group represent relatively superior intelligence. In chart 8, the reverse situation is shown in which the longer lines represent a relatively high incidence of inferior intelligence. It might be possible for a group to rate high in both superior and inferior intelligence, if it were extremely variable and had principally only superior and degenerate individuals, and practically no great middle class. But by comparing charts 7 and 8, we find that such situation does not exist. Thus the whole distribution in the low, medium, and superior intelligence groups is shown in chart 9. TABLE 4.-Estimate of comparative natural intelligence of the total white and foreign-born populations of the United States [Basis: Psychological examination of 94,004 white men selected at random, but pro rata by States, in the United States Army, of whom 12,407 were foreign born (chap. VI, pp. 693699, Psy. Ex. in U. S. Army, Mem. XV, Nat. Acad. Sci., 1921).] |