Overview
- Researchers from Boston Consulting Group and UC Riverside, writing in Harvard Business Review, report that about 14% of AI‑using U.S. workers experience a distinct cognitive fatigue they label “AI brain fry.”
- Surveyed employees who reported this condition logged 33% more decision fatigue, 11% more minor mistakes, and 39% more major errors compared with peers who did not report it.
- Prevalence varied by role, with marketing highest at roughly 25–26% and legal lowest near 5–6%, indicating risk concentrates in functions juggling diverse AI workflows.
- Productivity gains tapered as workers stacked tools, with perceived benefits turning negative after more than three AI tools, while using AI to offload repetitive tasks was linked to lower burnout.
- Managerial guidance and clear workflow design were associated with less fatigue, as outlets also noted corporate signals pushing heavier AI use and a small UK executive survey reporting many leaders delegate most decisions to AI.