@article{ref1,
title="Age and intelligence of a group of juvenile delinquents",
journal="Journal of abnormal and social psychology",
year="1939",
author="Mann, C.w. and Mann, H.p.",
volume="34",
number="3",
pages="351-360",
abstract="<p><br/>Nearly two thirds of the 1731 juvenile delinquents studied were boys. The mean age was 14.47 years. The mean IQ of the total group was 84.45. There are no sex differences of statistical significance with respect to mean age, variability of age, percentages in the various age groups, mean IQ, variability of IQ, and percentages in the various IQ levels. The group of boys 14 years and over tended to have a slightly higher mean IQ than that of the group below 14 years. This difference did not appear in the distribution of the results of the girls. (PsycINFO Database Record (c) 2006 APA, all rights reserved)</p><p />",
language="",
issn="0096-851X",
doi="10.1037/h0053971",
url="http://dx.doi.org/10.1037/h0053971"
}