538 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



Table 188. — Chronological age medians /or tests oj examination a, Form A, based on 1,162 California children, grades 

 S to 9, children oj joreign parentage excluded. The first year oj high school is included. Boys (B), girls (G), and 

 sexes taken together (T). 



Table 189. — Stanjord-Binet mental age. norms, examination a (Form A) (S10 school children). 



Examination a. 



Mental age medians (age 8— 8 to 8.9). 



14- 15- 16- 17- 18- 19- 



Number of cases. 



Testl 



Test 2 



Test 3 



Test 4 



Test 5 



Test 6 



Test7 



Test 8 



Test9 



Test 10 



Totalsoore 



Whittier delinquents (142 cases). 

 Indiana prisoners (256 cases) 



10 

 2.0 

 3.3 



.7 

 1.5 

 1.7 

 2.3 



.5 

 1.2 



.8 

 3.0 



27.0 

 26 



8.5 

 .9 

 .6 



1.3 

 .9 



8.1 



51 

 4.4 



5.2 

 3.6 

 3.5 



15.5 

 3.3 

 1.3 

 1.9 

 5.8 



12.3 



41 

 5.3 

 5.2 

 5.9 

 5.5 



18.5 

 5.6 

 4.1 

 3.1 

 8.4 



14.2 



25 

 6.2 

 6.7 

 6.4 

 5.9 



21.3 



11.2 

 4.3 

 3.5 

 9.5 



14.4 



56.0 



33 



65 



95.0 



45 



90 



129.0 

 83 

 113 



145. 



110 



138 



35 



6.8 

 4.9 

 9.2 

 7.4 

 21.8 

 11.8 

 5.4 

 4.9 

 12.8 

 16.7 



173.0 



127 



164 



24 



7.2 



5.5 



11.3 



7.8 



24.3 



14.0 



6.0 



5.3 



18.0 



16.9 



197.0 

 137 



185 



12.3 

 9.5 

 24.3 

 18.3 

 6.2 

 7.3 

 22.7 

 19.0 



25 



8.7 



6.7 



15.0 



9.5 



24.5 



19.8 



6.4 



8.9 



25.3 



20.9 



17 



9.8 



7.6 



14.3 



10.2 



26.5 



23.5 



6.6 



10.4 



26.8 



22.2 



10 

 10.0 



6.5 

 16.5 

 11.5 

 25.3 

 24.5 



6.5 

 10.5 

 26.3 

 20.8 



208.0 



157 



205 



248. 268. 275. 



(Forms B and D.) 



228 | I 



12 

 10.0 



9.7 

 20 

 13.4 

 32 

 32 



8.5 

 12.8 

 36 

 24.3 



323.0 



Table 190. — Medians oj beta tests by school grade — 597 white children, Petersburg, Va. — Beta tests. 



