Measurement of IQ occurs first in the year 1905 by researchers at France nationals want to split off from normal people retarded person to manage the appropriate studies. By using a comparison between the capabilities that should be the brain age, and then calculated into percentage. Current measurement often used IQ tests of Western travellers who developed since 1930 by politicians, academics, and the military's research group is an all group is a group of 11 tests that require interaction languages 6 languages do not require group interaction, group 6, as follows:
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