If you believe this, then doing a fifteen-minute writing exercise at the start of a fifteen week course in which you "write about your values" rather than a different fifteen-minute writing exercise where you "write about other peoples values" leads you to understand introductory physics significantly better at the end, if you're a woman, or understand introductory physics significantly worse, if you're a man.
I could start speculating on mechanisms for this, but I think it's better to wait until the same effect has been replicated in a different place and a different time (and let's hope that none of those future test subjects have read this article or else they'll know what's up).
On the other hand, if one were to repeat this experiment one would have to wonder whether it's ethical to force male students to do a writing exercise if you have reason to believe that it will hinder their ability to learn physics.
Update: My alternative hypothesis is that all the competent male students who showed up for a Physics class and were given a silly "write about your values" exercise got so offended by such a frou-frou exercise in what was supposed to be a physics class that they dropped out and enrolled in something else.