Sex differences in psychometric and chronometric measures of intelligence among young adolescents

We analysed the effects of sex on psychometric and chronometric measures of intelligence in a sample of 234 secondary school students. We found that sex affects measures of specific abilities such as spatial or word fluency tests and visual forms tests but that it showed no effect on either high g-loaded tests or on composite measures obtained by principal components analysis. Also these effects seem to be stable between ages 11 and 14 years.