When Using AI Leads to “Brain Fry
1,488 US workers; 39 percent higher major errors; 33 percent more decision fatigue; productivity peaks at three simultaneous AI tools.
Cited in
Bedard, Julie, et al. 'When Using AI Leads to "Brain Fry".' Harvard Business Review / BCG, March 2026. (1,488 US workers; 39 percent higher major errors; 33 percent more decision fatigue; productivity peaks at three simultaneous AI tools.)