Women: A Man’s finer Points
I have recently read an article that underscores predisposing components for behavioural tendencies which starts in utero. What this article states is how testosterone in the development of the foetus plays a very significant role in adults. In females, there does not seem to be a great deal of influence. However, numerous studies seem to consistently show that the behavioural tendencies of men are correlated with the level of testosterone.
The article also states that the influence of testosterone in utero also contributes to the finger length as well.
This is not the first time I have seen articles about finger length and testosterone levels in utero. But what was interesting was how this article used a ratio of the 2nd and 4rth digits for classification.
In other words, if the index finger and ring finger is close in length, then the level of testosterone was appropriately supplied in utero.
Having appropriate levels also seem to contribute to a more agreeable constitution as well ( as represented in the study).
For example, a male having a narrow ratio with the Index to ring finger seems to indicate he would be less argumentative with his female counterpart as well as with women in general. In fact, he would more likely to be a good listener and interact well with children. Sounds like a “handy” thing to know, doesn’t it? So, Have I stirred your interest? Enjoy the article below.
A video related to this topic can be found here:
PUBLIC RELEASE: 18-FEB-2015
Can you judge a man by his fingers?
Study finds link between relative lengths of index and ring fingers in men and behavior towards women
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This news release is available in French.
Maybe you should take a good look at your partner’s fingers before putting a ring on one. Men with short index fingers and long ring fingers are on average nicer towards women, and this unexpected phenomenon stems from the hormones these men have been exposed to in their mother’s womb, according to a new study by researchers at McGill University. The findings might help explain why these men tend to have more children. The study, showing a link between a biological event in fetal life and adult behaviour, was published in the journal Personality and Individual Differences.
Men’s index fingers are generally shorter than their ring fingers. The difference is less pronounced in women. Previous research has found that digit ratio – defined as the second digit length divided by the fourth digit length – is an indication of the amount of male hormones, chiefly testosterone, someone has been exposed to as a fetus: the smaller the ratio, the more male hormones. The McGill study suggests that this has an impact on how adult men behave, especially with women.
“It is fascinating to see that moderate variations of hormones before birth can actually influence adult behaviour in a selective way,” says Simon Young, a McGill Emeritus Professor in Psychiatry and coauthor of the study.
Smiles and compliments
Several studies have been conducted previously to try to assess the impact of digit ratio on adult behaviour. This one is the first to highlight how finger lengths affect behaviour differently depending on the sex of the person you are interacting with. “When with women, men with smaller ratios were more likely to listen attentively, smile and laugh, compromise or compliment the other person,” says Debbie Moskowitz, lead author and Professor of Psychology at McGill. They acted that way in sexual relationships, but also with female friends or colleagues. These men were also less quarrelsome with women than with men, whereas the men with larger ratios were equally quarrelsome with both. For women though, digit ratio variation did not seem to predict how they behaved, the researchers report.
Digit ratio and children
For 20 days, 155 participants in the study filled out forms for every social interaction that lasted 5 minutes or more, and checked off a list of behaviours they engaged in. Based on prior work, the scientists classified the behaviours as agreeable or quarrelsome. Men with small digit ratios reported approximately a third more agreeable behaviours and approximately a third fewer quarrelsome behaviours than men with large digit ratios.
A previous study had found that men with smaller digit ratios have more children. “Our research suggests they have more harmonious relationships with women; these behaviors support the formation and maintenance of relationships with women,” Moskowitz says. “This might explain why they have more children on average.”
The researchers were surprised to find no statistically relevant link between dominant behaviours and digit ratios. They suggest future research could study specific situations where male dominance varies – such as competitive situations with other men – to see whether a correlation can be established.
This study was funded by a grant from the Social Sciences and Humanities Research Council – Canada.
“Fetal exposure to androgens, as indicated by digit ratios (2D:4D), increases men’s agreeableness with women” D.S. Moskowitz, Rachel Sutton, David C. Zuroff, Simon N. Young, Personality and Individual Differences, March 2015 (available online 27 November 2014) http://www.sciencedirect.com/science/article/pii/S0191886914006400