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Ainu alike amongst ancestry Anglo-Dane arrested development average deviation blended inheritance boys causes cent central tendency cephalic index chance color color blind combinations of traits correlation cross-lines defects degree determiners discrimination distribution of ability divergences educational psychology eminent ences environment equal error facts feeble-minded form of distribution germs gifted girls give given grade greater Havelock Ellis heredity human nature idiots imbecile individual differences inferior influence inheritance intellectual less means measurements memory ment mental traits moral Negritos original nature ovum pair parents person physical possess probably psychology pupils race ratios reaching or exceeding relation relative frequencies represented resemblance respect S1ngle sample scale scientific selection sense sex differences size-weight illusion sort superior Suppose surface of frequency Table teachers tion tt tt twins type theory unit characters variability vary viduals William the Silent women
Page 184 - The above and other analogous observed facts indicate that all branches of intellectual activity have in common one fundamental function (or group of functions) , whereas the remaining or specific elements of the activity seem in every case to be wholly different from that in all the others.
Page 66 - Fourthly, the number among the negroes of those whom we should call half-witted men is very large. Every book alluding to negro servants in America is full of instances. I was myself much impressed by this fact during my travels in Africa. The mistakes the negroes made in their own matters were so childish, stupid, and simpleton-like as frequently to make me ashamed of my own species. I do not think it any exaggeration to say that their c is as low as our e, which would be a difference of two grades,...
Page 87 - The upshot of it all is, that as regards intellectual life, environment is a totally inadequate explanation. If it explains certain characters in certain instances, it always fails to explain as many more; while heredity not only explains all (or at least 90...
Page 186 - There is no one memory to hold in a uniformly tight or loose grip all the experiences of the past. There are only the particular connections between particular mental events and others, sometimes resulting in great surety of revival, sometimes in little.
Page 119 - They have had exactly the same nurture from their birth up to the present time; they are both perfectly healthy and strong, yet they are otherwise as dissimilar as two boys could be, physically, mentally, and in their emotional nature.
Page 60 - Singhalese, the average differences were small, and much overlapping occurred. As between these groups, however, and the Igorot and Negrito from the Philippines and a few reputed Pygmies from the Congo, the average differences were great, and the overlapping was small.
Page 48 - The fighting instinct is, in fact, the cause of a very large amount of the world's intellectual endeavor. The financier does not think for money, nor the scientist for truth, nor the theologian to save souls. Their intellectual efforts are aimed in great measure to outdo the other man, to subdue nature, to conquer assent. The maternal instinct in its turn is the chief source of woman's superiorities in the moral world.
Page 66 - A native chief has as good an education in the art of ruling men, as can be desired ; he is continually exercised in personal government and usually maintains his place by the ascendency of his character, shown every day over his subjects and rivals.
Page 40 - These facts make it extremely probable that, except in the two years nearest the age of puberty for girls, the male sex is slightly more variable. From the time of puberty for boys to maturity this difference seems to increase rapidly, though the records of marks which support this conclusion are not the best of evidence. The variability of girls with respect to the age at which any given school grade is reached is less than that of boys.