The length of a man's fingers can also reveal a lot, particularly about his physically aggressiveness. The shorter the index finger is, compared to the ring finger, the more boisterous he will be, the researchers of
The results of numeracy and literacy tests for seven-year-old children can be predicted by measuring the length of their fingers, another study showed. A clear link was found between a child's performance in numeracy and literacy tests and the relative lengths of their index and ring fingers. Scientists believe that the link is caused by different levels of the exposure to hormones testosterone and oestrogen in the womb -- and the effect they have on both brain development and finger length. One study also found that boys with shorter ring fingers tended to be at greatest risk of a heart attack in early adulthood, which was linked to testosterone levels.
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