Second to fourth digit ratio and numerical competence in children.
Second to fourth digit ratio and numerical competence in children.
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儿童第二至第四数字比例和数字能力。
DOI：
10.1016/j.bandc.2006.01.001
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Geary,DavidC
中科院分区：
文献类型：
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作者：
Fink,Bernhard;Brookes,Helen;Neave,Nick;Manning,JohnT;Geary,DavidC
The ratio between the 2nd and 4th fingers (2D:4D)—a potential proxy for prenatal testosterone (T) exposure—shows a sex difference, with males usually having lower mean values; the latter potentially indicates higher prenatal T exposure. We studied relations between 2D:4D and competencies in the domains of counting, number knowledge, and visual-number representation in 73 children aged 6–11 years. Significant negative correlations between numerical performance in all of these areas and right and left hand 2D:4D ratios were found for boys but not girls. To the extent that 2D:4D ratios reflects prenatal exposure to T, the implications are (i) high prenatal T may be associated with better performance on some basic numerical measures for boys, and (ii) prenatal exposure to T may affect boys and girls differently with respect to some numerical competencies.
