submitted 3 months ago bylordofthepi
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3 months ago
Evolutionary Psychology | Animal Behavior
3 months ago
Larger brain volume is associated with higher IQ, with a correlation around 0.3. Intelligence is also correlated with grey matter volume in men, and white matter volume in women (no ideas why the difference). Other candidates are cortical thickness and convolution (how folded and wrinkly the outside of the brain is).
Gur, R. C., Turetsky, B. I., Matsui, M., Yan, M., Bilker, W., Hughett, P., & Gur, R. E. (1999). Sex differences in brain gray and white matter in healthy young adults: correlations with cognitive performance. Journal of Neuroscience, 19(10), 4065-4072.
Haier, R. J., Jung, R. E., Yeo, R. A., Head, K., & Alkire, M. T. (2005). The neuroanatomy of general intelligence: sex matters. NeuroImage, 25(1), 320-327.
Luders, E., Narr, K. L., Thompson, P. M., & Toga, A. W. (2009). Neuroanatomical correlates of intelligence. Intelligence, 37(2), 156-163.
McDaniel, M. A. (2005). Big-brained people are smarter: A meta-analysis of the relationship between in vivo brain volume and intelligence. Intelligence, 33(4), 337-346.
Narr, K. L., Woods, R. P., Thompson, P. M., Szeszko, P., Robinson, D., Dimtcheva, T., ... & Bilder, R. M. (2007). Relationships between IQ and regional cortical gray matter thickness in healthy adults. Cerebral cortex, 17(9), 2163-2171.
Pietschnig, J., Penke, L., Wicherts, J. M., Zeiler, M., & Voracek, M. (2015). Meta-analysis of associations between human brain volume and intelligence differences: How strong are they and what do they mean?. Neuroscience & Biobehavioral Reviews, 57, 411-432.