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CHAPTEB PAGE I INTRODUCTION
CONDITIONS OF THE INVESTIGATION
MENTAL AGE AS A BASIS FOR CLASSIFICATION
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12 months 24 per cent 25 Range 63 months ability and achievement accomplishment quotient arith Arithmetic A. A. 24 arithmetic age arithmetic quotient arithmetic-age group basis for sectioning basis of classification best basis cent in reading chronological age CLASSIFYING THIS EDUCATIONAL-AGE CLASSIFYING THIS MENTAL-AGE computation and reasoning educa educational age educational quotient educational-age month eighteen months equal gains gain in months grade placement group into sections GROUP INTO X homogeneity in terms intelligence quotient mental age mental-age group metic months in 1924 months in arithmetic months to 12 number of month's percentage of overlapping plan of classification pupils possessing Range in Months range was reduced Ranges in achievement reading age reading and arithmetic Reading R. A. 24 Results of Classifying RESULTS OF SECTIONING SECTIONING THE MENTAL-AGE SECTIONING THE TOTAL standard deviation Stanford Achievement Test teachers tion tional age total fifth-grade group total group X 25 Range year's