For adults,heritability estimates average around .30 to .35; that is,about one-third of the variance in IQ scores is explainable by genetic differences.

Name: For adults,heritability estimates average around .30 to .35; that is,about one-third of the variance in IQ scores is explainable by genetic differences.
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Heritability estimates for adult IQ are generally higher, often around 0.50 to 0.80, indicating that genetic differences account for about 50% to 80% of the variance in IQ scores among adults.

For Adults,heritability Estimates Average Around