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 . S. F. has attendedexcellent schools for eleven years andhas recently been promoted to theseventh grade. The teacher admits,however, that she cannot do the workof that grade, but says, I have ntthe heart to let her fail in the sixthgrade for the third time. She studiesvery hard and says she wants to be-come a teacher! At the time the test Fig. 9. BALL AND FIELD TEST. was made she Was actually studyingS. F., AGE 17; MENTAL AGE n-6 her


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 . S. F. has attendedexcellent schools for eleven years andhas recently been promoted to theseventh grade. The teacher admits,however, that she cannot do the workof that grade, but says, I have ntthe heart to let her fail in the sixthgrade for the third time. She studiesvery hard and says she wants to be-come a teacher! At the time the test Fig. 9. BALL AND FIELD TEST. was made she Was actually studyingS. F., AGE 17; MENTAL AGE n-6 her books from two to three hours daily at home. The aunt, who isvery intelligent, had never thought of this girl as feeble-minded,and had suffered much concern and humiliation because of herinability to teach her to conduct herself properly toward men andnot to appropriate other peoples property. S. F. is ordinarily docile, but is subject to fits of anger and ob-stinacy. She finally determined to leave her home, threatening totake up with a man unless allowed to work elsewhere. Since thenshe has been tried out in several families, but after a little while in. INTELLIGENCE QUOTIENT SIGNIFICANCE 89 & place she flies into a rage and leaves. She is a fairly capablehouseworker when she tries. This young woman is feeble-minded and should be classed assuch. She is listed here with the border-line cases simply for thereason that she belongs to a group whose mental deficiency isalmost never recognized without the aid of a psychological no physician could be found who would diagnose the case,on the basis of a medical examination alone, as one of feeble-mindedness. F. H. Boy, age 16-6; mental age 11-5; I Q approximately 72{disregarding age above 16 years). Tested for three successive yearswithout change of more than four points in I Q. Father a laborer,dull, subject to fits of rage, and beats the boy. Mother not far fromborder-line. F. H. has always had the best of school adva


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