%0 Journal Article
%T Spearman¡¯s Hypothesis Tested Comparing 47 Regions of Japan Using a Sample of 18 Million Children
%A Edward Dutton
%A Jan te Nijenhuis
%A Kenya Kura
%J -
%D 2019
%R https://doi.org/10.3390/psych1010002
%X Abstract Many groups differ in their mean intelligence score. Spearman¡¯s hypothesis states that the differences are a function of cognitive complexity. There tend to be large differences on subtests of high cognitive complexity and small differences on subtests of low cognitive complexity. Spearman¡¯s hypothesis has been supported by a large number of studies. Can Spearman¡¯s hypothesis be generalized to regions of a country, where these regions differ in mean intelligence? We utilized data from 86 different cognitive tests from all 47 Japanese prefectures and correlated the g loadings of 86 subtests with standardized differences on the same subtests. Spearman¡¯s hypothesis was clearly supported: the biggest differences between the regions were on the tests that were of the greatest complexity, meaning that Spearman¡¯s hypothesis may be generalizable from groups to regions. In Japan, g loadings offer a better explanation of group differences in intelligence than cultural differences. Future research should explore whether Spearman¡¯s hypothesis is also supported for differences between regions of other countries. View Full-Tex
%K intelligence
%K Spearman¡¯s hypothesis
%K group difference
%K Japan
%U https://www.mdpi.com/2624-8611/1/1/2