So measuring variance of Colom's study of 4,072 high school graduates, they found that females outperform males on the inductive Primary Mental Abilities reasoning test, males outperform females on the Raven's Progressive Matrices and that there is no difference on the Culture-Fair intelligence test and therefore concluded no difference in general intelligence.
Using multi-group covariance and mean group structure analysis in 2006, researchers Sophie van der Sluis, Conor V.
A study conducted by Jim Flynn and Lilia Rossi-Case (2011) found that men and women achieved roughly equal IQ scores on Raven's Progressive Matrices after reviewing recent standardization samples in five modernized nations.
With the advent of the concept of g or general intelligence, many researchers have argued for no significant sex differences in g factor or general intelligence In 1801, Thomas Gisborne said that women were naturally suited to domestic work and not spheres suited to men such as politics, science, or business.He did, however, find "rather marked" differences on a minority of tests.For example, he found boys were "decidedly better" in arithmetical reasoning, while girls were "superior" at answering comprehension questions.After a study with a nationally representative sample of 926 participants in the UK, no sex difference was found in the Raven's Progressive Matrices test. Keith on 25 subtests of Woodcock-Johnson Tests of Cognitive Abilities, along with a sample of 6,818 adults and children from 6 to 59, found females scoring higher on the latent processing speed (Gs) factor, a small male advantage on the latent comprehension–knowledge (Gc) factor, higher male score on the latent visual–spatial reasoning (Gv) and higher male latent quantitative reasoning (RQ) factor.However the sex difference in general intelligence (g-factor) was inconsistent in children with small higher female g factor during adolescence, and consistent higher female latent g factor during adulthood.