Manual of mental and physical tests : a book of directions compiled with special reference to the experimental study of school children in the laboratory or classroom . age. ^hese charts have only an approximate accuracy because of the lim-ited number of cases (300-400 in most years). They are reproduced herepartly to show the method of displaying norms which we need to followfor quick and accurate rating of performance in various mental as wellas physical tests. Evidently percentile tables of this sort necessitatethe gathering of data by standardized tests from large numbers of chil-dren of b
Manual of mental and physical tests : a book of directions compiled with special reference to the experimental study of school children in the laboratory or classroom . age. ^hese charts have only an approximate accuracy because of the lim-ited number of cases (300-400 in most years). They are reproduced herepartly to show the method of displaying norms which we need to followfor quick and accurate rating of performance in various mental as wellas physical tests. Evidently percentile tables of this sort necessitatethe gathering of data by standardized tests from large numbers of chil-dren of both sexes and various ages. The lack of percentile tables formental tests is one of the most serious handicaps now existing in theirapplication. The valuable percentile charts of Porter (20) are worthy of consulta-tion by particularly interested in anthropometric work. OS ANTHROPOMETRIC TESTS 180 175 * 170 • 165 ? 160 •155 150 ••145 140 -135 130 - 125 120 •• 115110 105 * 100 ?•95 jo so A0 50 60 7 0 8< 3 9( 1—^-^ ^ ^ /- y ^^ ^ ^ ^ FIG. 6. PERCENTILES OF HEIGHT FOB BOYS (SMEDLEY) TEST 1 : HEIGHT 69 9,0 30 40 50 60 70 fiO 90. FIG. 7. PERCENTILES OF HEIGHT FOE GIRLS (SMEDLEY) 7U ANTHROPOMETRIC TESTS i 3 i During the period of approximately 11 to 14 years girlsare taller than boys of the same age, because the prepubertalacceleration of growth occurs earlier in girls. (4) Sitting-height follows the same general laws as stand-ing-height. (5) Boys continue their growth in height later than dogirls, i. e., maturity in height is not reached so early. (G) Children of purely American descent are taller thanthose of foreign-born parentage (Bowditch, Peckham). (7) Bace seems to be more important than social or envi-ronmental conditions in determining absolute growth, but thelatter conditions may influence the rate of growth at differentstages of development (Meumann, pp. 82-3). (8) Children of the non-laboring classes are, as a group,taller than children
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectpsychophysiology
