Intelligence tests with higher g-loadings show higher correlations with body symmetry: Evidence for a general fitness factor mediated by developmental stability

Just as body symmetry reveals developmental stability at the morphological level, general intelligence may reveal developmental stability at the level of brain development and cognitive functioning. These two forms of developmental stability may overlap by tapping into a “general fitness factor.” If...

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Bibliographic Details
Published in:Intelligence (Norwood) 2005-03, Vol.33 (2), p.203-213
Main Authors: Prokosch, Mark D., Yeo, Ronald A., Miller, Geoffrey F.
Format: Article
Language:English
Subjects:
Attractiveness
Biological and medical sciences
Body shape
Body symmetry
Brain
Cognition. Intelligence
Correlation analysis
Developmental processes
Fitness
Fundamental and applied biological sciences. Psychology
g-loadings
Genetic factors
Genotype & phenotype
Intellectual and cognitive abilities
Intelligence
Intelligence Tests
Physical growth
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Symmetry
Young men
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Summary:Just as body symmetry reveals developmental stability at the morphological level, general intelligence may reveal developmental stability at the level of brain development and cognitive functioning. These two forms of developmental stability may overlap by tapping into a “general fitness factor.” If so, then intellectual tests with higher g-loadings should show higher correlations with a composite measure of body symmetry. We tested this prediction in 78 young males by measuring their left–right symmetry at 10 body points, and by administering five cognitive tests with diverse g-loadings. As predicted, we found a significant ( z=3.64, p
ISSN:0160-2896
1873-7935
DOI:10.1016/j.intell.2004.07.007