The intelligence of the delinquent boy . been used will be dis-cussed under The social-intelligence groups. Intelligence quotients of 470 delinquent boys. In Fig. 3 and : the for the entire group are shown. Fig. 3 shows the ofeach case in its exact relation to all of the others, together with thesocial-intelligence group in which it belongs. It will be seen from thedistribution that the of the 470 cases range from .47 to wide range of deviation is of great significance when it is con-sidered that until a very few years ago the factor of intelligence dif-ference
The intelligence of the delinquent boy . been used will be dis-cussed under The social-intelligence groups. Intelligence quotients of 470 delinquent boys. In Fig. 3 and : the for the entire group are shown. Fig. 3 shows the ofeach case in its exact relation to all of the others, together with thesocial-intelligence group in which it belongs. It will be seen from thedistribution that the of the 470 cases range from .47 to wide range of deviation is of great significance when it is con-sidered that until a very few years ago the factor of intelligence dif-ferences was rarely taken into account in the training of delinquents,and in the reform w^hich state institutions were expected to bringabout. Yet this group (probably not differing greatly in this respectfrom the population of any other state industrial school) contains de-grees of intellectual brightness ranging from imbecility on the onehand to superiority probably not exceeded in the general popula-tion by more than one child in a la. ^5-)9 5(>-«4«-S9 60-*44S*» 70-74 Tf-?? S<Va405-69 90-94 95-79 MO-OOar-o/l-M IS-ff 10» Fig. 4, General distribution of I. by groups of five, for juvenileand adult cases. At the time of this writing there has been occasion to retest 13cases. In these the has been found to be even less variable, onthe whole, than Terman found in his mixed group. The averagedifference in between the first and second tests for our 13 casesis barely 3 per cent. If we omit one case (No. 9 in Table I) in whichtliere is a high probability that the element of coaching may haveaffected the test, the average falls to 2 per cent, the highest differ- 22 The Journal of Delinquency, Monograph No. 1 !2L !£?;:
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Keywords: ., bookcentury1900, bookdecade1910, bookidintelligence, bookyear1919
