Grades dropped from 96 to 48 percent when a Brown professor made students take the exam without AI

An economics professor at Brown University suspects most of his 86 students used AI to cheat on a take-home exam that averaged 96 percent. When he made the final an in-person test, 18 students dropped the course, nine didn't show up, and the average fell to 48.6 percent. Two large studies from China and UC Berkeley back up his case: where students lean on AI for homework, their proctored exam scores tank.

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