Testosterone And Cooperation in Women

Whaaa?

Giving women more of the male hormone testosterone can turn them into fairer and more amiable game players, according to tests.

A single dose of testosterone was enough to have this effect, European scientists found, but only if the woman was oblivious to the treatment.

If she realised she had received the hormone and not a dummy drug, she turned to greed and selfishness.

The work in Nature magazine suggests the mind can win over hormones.
Testosterone induces anti-social behaviour in humans, but only because of our own prejudices about its effect rather than its biological activity, suggest the authors.

They believe the same is true in men, although they only studied women. 

 One study...and it's hard to tell what is really going on from this report...and I find it pretty hard to believe... Except for being able to "win [out?] over hormones," which is clearly true...

Weird.