Is Male Kindness Actually a "Peacock Tail?"

A new paper from psychology researchers Mark Van Vugt and Wendy Iredale finds that acts of male kindness may not always be quite what they seem. From Science Daily:

Two experiments were undertaken. For the first, 65 men and 65 women, all of an average age of 21, anonymously played a cooperation game where they could donate money via a computer program to a group fund. Donations were selfless acts, as all other players would benefit from the fund, whilst the donor wouldn’t necessarily receive anything in return.

Players did not know who they were playing with. They were observed by either someone of the same sex or opposite sex — two physically attractive volunteers, one man and one woman. Men were found to do significantly more good deeds when observed by the opposite sex. Whilst the number of good deeds made by women didn’t change, regardless of who observed.

For the second experiment, groups of males were formed. Males were asked to make a number of public donations. These increased when observed by an attractive female, where they were found to actively compete with one another. When observed by another male, however, donations didn’t increase.

Iredale compares good deeds to peacock tails and sees room for intervention: “The research shows that good deeds among men increase when presented with an opportunity to copulate. Theoretically, this suggests that a good deed is the human equivalent of the peacock’s tail. Practically, this research shows how societies can encourage selfless acts.”

Ladies, we’re curious: since Tuesday was a day of love, did you perhaps notice more good deeds being done by the men in your life?

(HT: Eric M. Jones)