https://www.scientificamerican.com/article/does-brain-size-matter1/
In healthy volunteers, total brain volume weakly correlates with intelligence, with a correlation value between 0.3 and 0.4 out of a possible 1.0. In other words, brain size accounts for between 9 and 16 percent of the overall variability in general intelligence.
źródło: proofofconcept
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