It depends entirely upon your definition of "better":Mara Mather, a cognitive neuroscientist at the University of Southern California, and Nichole R. Lighthall, a cognitive neuroscientist now at Duke University, are two of the many researchers who have found that under normal circumstances, when everything is low-key and manageable, men and women make decisions about risk in similar ways. We gather the best information we can, we weigh potential costs against potential gains, and then we choose how to act. But add stress to the situation — replicated in the lab by having participants submerge their hands in painfully cold, 35-degree water — and men and women begin to part ways.Dr. Mather and her team taught people a simple computer gambling game, in which they got points for inflating digital...