The remarkably different answers men and women give when asked who’s the smartest in the class

The surveys asked each student to “nominate” their most knowledgeable classmates at three points during the school year. Who best knew the subject? Who were the high achievers?
To illustrate the resulting peer-perception gap, researchers compared the importance student grades had on winning a nomination to the weight of the gender bias. The typical student received 1.2 nominations, with men averaging 1.3 and women averaging 1.1.
Female students gave other female students a recognition “boost” equivalent to a GPA bump of 0.04 — too tiny to indicate any gender preference, Grunspan said. Male students, however, awarded fellow male students a recognition boost equivalent to a GPA increase of 0.76.
"On this scale," the report asserted, "the male nominators’ gender bias is 19 times the size of the female nominators’."