Article
Heritability of specific language impairment depends on diagnostic criteria.
Genes, brain, and behavior - 1 Apr 2008
Bishop D V M, Hayiou-Thomas M E
Abstract excerpt
Heritability estimates for specific language impairment (SLI) have been inconsistent. Four twin studies reported heritability of 0.5 or more, but a recent report from the Twins Early Development Study found negligible genetic influence in 4-year-olds. We considered whether the method of ascertainment influenced results and found substantially higher heritability if SLI was defined in terms of referral to speech...
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