At Dickinson, some professors and administrators have begun to notice a similar withdrawal among men who arrive on campus with deficient social skills. Each year, there are several who mostly stay in their rooms, talk to no one, play video games into the wee hours and miss classes until they withdraw or flunk out.

This spring, Rebecca Hammell, dean of freshman and sophomores, counseled one such young man to withdraw.

"He was in academic trouble from the start," Ms. Hammell said. "He was playing games till 3, 4, 5 in the morning, in an almost compulsive way. From early in the year, his teachers reported that he was either not coming to class or falling asleep once he was there. I checked with the Residential Life office, and they said he was in his room all the time."

Of course, female behavior has its own extremes. In freshman women, educators worry about eating disorders and perfectionism.

But among the freshman men, the problems stem mostly from immaturity.

"There was so much freedom when I got here, compared to my very structured high school life, that I kept putting things off," said Greg Williams, who just finished his freshman year. "I wouldn't do much work and I played a lot of Halo. I didn't know how to wake up on time without a mom. I had laundry problems. I shrank all my clothes and had to buy new ones."

Still, men in the work force have always done better in pay and promotions, in part because they tend to work longer hours, and have fewer career interruptions than women, who bear the children and most of the responsibility for raising them.

Whether the male advantage will persist even as women's academic achievement soars is an open question. But many young men believe that, once in the work world, they will prevail.

"I think men do better out in the world because they care more about the power, the status, the C.E.O. job," Mr. Kohn said. "And maybe society holds men a little higher."