The measurement of intelligence : an explanation of and a complete guide for the use of the Stanford revision and extension of the Binet-Simon intelligence scale . onsidered any one would think ofthem as institutional laboring men and ser-vant girls there are thousandslike them Thev are the worlds Ym n BALLAND ™LD TEST. iiKe tnem. xney are tne world s M p AGE 14; MENTAL AGE 10_8 hewers of wood and drawers of water. And yet, as far as intelligence is concerned, thetests have told the truth. These boys are uneducable be-yond the merest rudiments of training. No amou


The measurement of intelligence : an explanation of and a complete guide for the use of the Stanford revision and extension of the Binet-Simon intelligence scale . onsidered any one would think ofthem as institutional laboring men and ser-vant girls there are thousandslike them Thev are the worlds Ym n BALLAND ™LD TEST. iiKe tnem. xney are tne world s M p AGE 14; MENTAL AGE 10_8 hewers of wood and drawers of water. And yet, as far as intelligence is concerned, thetests have told the truth. These boys are uneducable be-yond the merest rudiments of training. No amount ofschool instruction will ever make them intelligent votersor capable citizens in the true sense of the word. Judgedpsychologically they cannot be considered normal. It is interesting to note that M. P. and C. P. representthe level of intelligence which is very, very common amongSpanish-Indian and Mexican families of the Southwest andalso among negroes. Their dullness seems to be racial,or at least inherent in the family stocks from which theycome. The fact that one meets this type with such extra-ordinary frequency among Indians, Mexicans, and negroes. 92 THE MEASUREMENT OF INTELLIGENCE suggests quite forcibly that the whole question of racialdifferences in mental traits will have to be taken up anewand by experimental methods. The writer predicts thatwhen this is done there will be discovered enormously sig-nificant racial differences in general intelligence, differ-ences which cannot be wiped out by any scheme of mentalculture. Children of this group should be segregated in specialclasses and be given instruction which is concrete and prac-tical. They cannot master abstractions, but they can oftenbe made efficient workers, able to look out for is no possibility at present of convincing societythat they should not be allowed to reproduce, althoughfrom a eugenic point of view they constitute a grave prob-lem because of their unusually prolific breeding. D


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