Artificial intelligence boosts homework scores but cuts exam results by 20 per cent, and this “brain drain” effect takes two years to fully emerge, a new study has found. Generative AI is rapidly transforming classrooms as much as workplaces, with students increasingly turning to chatbots to draft essays and solve problem sets. But is the technology a personalised tutor or a slow-acting cognitive poison? Research by scholars from Stockholm University and the University of Hong Kong, who tracked...