Genetic and environmental interactions in determining the early lexicon: evidence from a set of tri-zygotic quadruplets.
Genetic and environmental interactions in determining the early lexicon: evidence from a set of tri-zygotic quadruplets.
复制标题
确定早期词汇的遗传和环境相互作用：来自一组三合子四胞胎的证据。
DOI：
10.1017/s0305000904006026
复制
发表时间：
2004
影响因子：
2.2
通讯作者：
Capone,NinaC
中科院分区：
文献类型：
--
作者：
McGregor,KarlaK;Capone,NinaC
A set of tri-zygotic quadruplets, three girls and one boy, participated in weekly observations from 1;2 to 1;10 (years;months), a period of transition from prelinguistic gesture to 50 words. In the study, one girl served as a genetic mate to her identical twin and a biological risk mate to her fraternal sister. The biological risk mates achieved milestones in lexical development at similar times; however, the genetic mates demonstrated more similarities in pattern of lexical development and in the modality of their word productions. Degree of similarity changed over the observation period. Imposed upon the natural experiment was a within-subject manipulation of the social environment: The experimenters modelled a core vocabulary via the gesture+verbal modalities to the children during each visit. The modelling resulted in increased rates of word learning for three of the children; the child with the greatest biological risk, the boy, derived the greatest benefit. The findings provide unique support for a dynamic, multi-factorial model of lexical development involving the interaction of genetics, the biological environment and the social environment. Furthermore, they illustrate the robustness of early lexical development in the face of biological risks.
