The relations of general intelligence to certain mental and physical traits / Cyrus D. Mead.

  • Mead, Cyrus D. (Cyrus De Witt)
Date:
1916
Catalogue details

Licence: Public Domain Mark

Credit: The relations of general intelligence to certain mental and physical traits / Cyrus D. Mead. Source: Wellcome Collection.

    64/128 page 58
    TABLE XVI Averaart Grip ror Each Hanp AND Grape “SmMooTHEeD”’ By SUMS FOR THREE YEAR GROUPS Age 7-8-9 10-11-12 | 18-14-15 | 16-17-18 |19-20-21 | 22-23-24 ee ee el ee eal i Grade (UR. Go Rd, ae ee Gil Rd La Ed: a Ete a aes ——— | — | — |] ——— _, | ——— | ——— | | | | | | V2 ne eI 67.8160.4/118 |121.6}175.6)174. 6/300. 6/294.9/367/314 Dee eine 59. 6154.2/105. 7/101 .3}162.2)156. 9/264. 7/243 .8|316|276.8 CARN 7 24.5)21 79.81 76 |129 |120.7/253 |251.8|345/331.51237.8|240.8 dB NEAL) ines ae as 258. 71257 .3 SG, apr aD 159|160 {(219.5]195.4 A to BY... + i+ ar > eo c “¢ yay + AtoC,DorE| + | + ss oe + a a a oe vee B to CO. Satis Mec RAGn (Sea RANN Pip eras ci cocnto | PRO N Wrens Neiaee aaa) Eseone + — Balance AitouB eee 10 O 10+ AtoC,DorE 9 1 8+ BioCreuw 7 38 4+ PERCENTAGES OF DEFECTIVE Boys REACHING OR EXCEEDING THE AVERAGE NORMAL Boy IN STRENGTH OF GRIP When groups are compared by means of averages, the variabil- ity of the individuals in either group is neglected, and the over- lapping is not shown. A useful common method of additional comparison is to ascertain the percentage of one group reaching or exceeding the median or average accomplishment of the other group. Table XVII below gives these data for the defective boys in comparison with both the Chicago and Caldwell normals. If defective boys did on the whole as well as normal boys, fifty per cent would reach the median or average of the normal group. A larger per cent is seen to reach the average result of the Smed- ley measures than those of the Caldwell boys. The Chicago group of school boys was very probably a much more miscel- laneous group, including a greater percentage of inferior boys. The dominance of the left hand of the feeble-minded is noticed in 22.3 per cent reaching the average left hand score of the Cald- well boys as against 17.8 reaching the right hand score. GRADUATE MEN AND DEFECTIVES COMPARED The author wished to compare strength of grip in a group of “bright,” heavy, working “‘boys,’’ who constituted the most intelligent class of the Indiana Institution, and the strength of
    digitised image 1
    digitised image 2
    digitised image 3