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

  • Mead, Cyrus D. (Cyrus De Witt)
Date:
1916
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Licence: Public Domain Mark

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

    72/128 page 66
    TABLE XX “A”? PERCEPTION TESt-—FEEBLE-MINDED CHILDREN (190 Cass) Boys Girls Age| Cases AVR gu eee pon!” | Cases AV ORE LT xy | DOr eas age dian age dian 8 Ye 7.0 1.0 7 8 9 5 11.6 3/0) 11 2.5 3 12.3 3.7 | 14 5 a 10; 10 16.2 4.0 | 15.5 3.4 3 21.0 2 Ot Ly 11} 12 1S 5 6.5 | 10.5 ees) 6 30.7 8.7 | 26.5 1.0 12} 10 17.8 9:2 417 Cod 7 36.7 Tt oe 6.5 13) 14 19.4 TO 24.) 6.6 1 19 19 14, 16 20.1 74 e205 6.2.) 13 Slob Ri os 3.8 15) 13 23.3 8.3 | 21 7 6 2a (LOU Meee 9 16 f SY Urs i a Baa ae lope 10.8 11 30.8 | 10.7 | 30 9 17 5 31.6 | 10.6 | 31 8.9 11 34.0 | 12.4 | 30 10.4 18 1 25 PAS 10 25. 6.7 | 24.5 5.6 19 2 28.5 | 10.5 | 28.5 8.8 5 32.6 | 10,2 |] 29 8.6 20 11 RA Ake BER EAT I Wat! 10.2 21 4 33.0 7 O20 5.8 shay 2 39.5 5.5 | 39.5 4.6 97 93 Using the average as a measure of central tendency, Tables XIX and XX become Fig. 18. It is not safe to draw other than the most general conclusions owing to the few cases at age. With this limitation, however, the following is offered: 1. Normal children are better at each age than mentally defec- tive. 2. Normal children show a more rapid increase in ability with age. 3. Mentally defective girls show the same trait as known to exist in normal children: viz., girls are better than boys at each age. (See Table XI, p. 46, of Norsworthy, Psychology of Mentally Deficient Children.) 4. There may be less sex difference in the defectives after fourteen years. | 5. One sex seems about as variable as the other.
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