منابع مشابه
Digit ratio links prenatal hormone exposure with adult lung function
0.94 ± 0.30 to female values of 0.961 ± 0.033.2 A separate study of adult male Han reported similar digit ratio values of 0.9478 ± 0.0322 for the right hand.3 Park and coworkers1 postulated that age may have had an effect on digit ratio, but if so, the effect must have been subtle since age was not significantly correlated with digit ratio in males or females in their study. Furthermore, the ut...
متن کامل2nd to 4th digit ratio and offspring sex ratio.
There is evidence that the ratio of the length of the 2nd and 4th digit (2D:4D) is negatively related to prenatal and adult concentrations of testosterone. It has also been reported that high levels of testosterone at conception in both fathers and mothers are associated with an increased sex ratio (proportion of males at birth). It follows from these observations that low values of 2D:4D may b...
متن کاملAssociation between Second to Fourth Digit Ratio with Handwriting Quality and Speed among Elementary School Children
Background Genetic impacts on handwriting legibility and speed, especially in early childhood, are not well understood. The present study used a 2D:4D ratio as a biological marker to investigate the associations between genetic factors with quality and speed of handwriting among the elementary school children. Ma...
متن کاملOverconfidence, Incentives and Digit Ratio
This paper contributes to a better understanding of the biological underpinnings of overconfidence by analyzing performance predictions in the Cognitive Reflection Test with and without monetary incentives. In line with the existing literature we find that the participants are too optimistic about their performance on average; incentives lead to higher performance; and males score higher than f...
متن کاملThe Ratio of Second to Fourth Digit Length (2D:4D) in Children with Autistic Disorder
Introduction Emerging hypotheses suggest a causal role for prenatal androgen exposure in some cases of Autism spectrum disorders (ASD). The ratios of the lengths of the bones of the 2nd to the 4th digits (2D:4D) are purported to be markers for prenatal androgen exposure and to be established early in gestation. Ratio of second and fourth digits (2D:4D) is usually used as a proxy for prenatal t...
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ژورنال
عنوان ژورنال: Early Human Development
سال: 2016
ISSN: 0378-3782
DOI: 10.1016/j.earlhumdev.2016.07.004