BCG Finds AI Use Induces Cognitive Fatigue

Boston Consulting Group researchers published a Harvard Business Review study this month surveying 1,488 full-time US workers, finding 14% reported "AI brain fry" symptoms such as mental fog, headaches, and slower decision-making. The study shows productivity rises when adopting up to two AI tools but falls as employees juggle more systems, especially in marketing, HR, operations, and software engineering.