Experimental study of children : including anthropometrical and psycho-physical measurements of Washington school children, and a bibliography / by Arthur MacDonald.

  • United States. Bureau of Education.
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Experimental study of children : including anthropometrical and psycho-physical measurements of Washington school children, and a bibliography / by Arthur MacDonald. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    touch simultaneously the skin on tlie palmar surface of the wrist. He was asked if he felt one or two points. In case he felt only one point, the instrument was raised and the points were moved farther apart. If he felt the two points, they were moved closer together. Just as soon as he became uncertain in either case, as to whether there were one or two points touching the skin, the distance between the points iEstliesiometer. was read in millimeters as recorded by the scale on the rod. It takes more acuteuess to distinguish two points on the skin the closer the points are together. The distance of the two points from each other, when the pupil is in doubt, is taken as a measure of his sense of local- ity. The less the distance the more acute is his sense, and the greater the distance the more obtuse his sense of locality. KESULTS OF INVESTIGATION. It is a general principle in neTf lines of inquiry to regard tlie results as more or less tentative according to the number of experiments made. In this work the results depend upon averages, Avhich are valuable according to the whole numbers from which the averages are made. The conclusions, therefore, will be more trust- worthy the larger tlie numbers measured. In many instances those numbers are not as large as wo would desire; but we hope this will induce some investigator to make experiments upon larger numbers. Table A.—Boys. [Boys means white boya. When colored children are meant, it is so slat-ed.] Class. dumber of cases. Average age. a Y.M. Bright... 237 12 4 Dull .... 137 13 ] Average. 142 12 1 Unruly c. 10 14 5 Tota\... 526 Average 12 9 Cephalic index. fDolicho. 20 ^Meso ...121 [Brachy . 9C (Dolicho. 21 {Meso ... 56 iBraohy. 59 fDolicllo. 17 meso ... 58 I Brachy . 67 (Uoliclio. 4 Moso ... 3 Brachy . 3 Least sensibility to locality. 6 Eight wrist. fDolicho. 62 nieso ...238 iBrachy .225 Mm. 3, 791 16.1 2, 222 16.2 2,426 17.1 150 15 8, 589 16.4 Left wrist. 3,559 15 2,133 15.6 2,315 16.3 145 14.5 Strength of grasp.6 Eight hand. 8,152 15.5 Kilos. 4,687 19.9 3, 369.5 24.6 2,644 18.6 291 29.1 Left hand. Kilos. 4,331 18.3 3,161 23.1 2,501.5 17.7 277 27.7 10, 991. 5 10, 270.5 Le.Tst 8en.sibility to heat. 6 Eight wrist. 900. 49 3.80 597. 50 4. 36 646. 25 4.62 42.50 4. 25 20. 9 19.6 2,186.74 4.17 Loft wrist. °R. 828. 09 3.51 551.25 4.05 C03 P.et. 13. 75 \ 4. 34j/ 44. 00 4. 40 15 11 40 2, 027. 09 3.89 11 S-5 1^ 1^ F.ct. 51 41 40 SO 45 .= •9 P.ct. 41 44 49 30 44 a Average ago only is given, as the number is too small for division.s according to ago. ilu columns lor lociility, strength, and lieiit boUi totals and averages are given. cOnly 10 boya were reported unrulj'; no girls of the 548 (table 13) wore reported unruly.