I missed this when it came out

Does College Make You Dumber? : "What was most surprising was the finding that at 16 of the 50 schools, the freshmen did better than the seniors. We were startled by the extent of what we call "negative learning." When courses are not offered or required, the students forget what they knew when they entered as freshmen, and that 16 included some of the best schools in the country, Berkeley, Johns Hopkins, Georgetown, Duke."