AI designed to help users work smarter can cause AI brain fry

A study by researchers at Boston Consulting Group published in the Harvard Business Review found that while artificial intelligence (AI) is marketed as a tool to simplify work, many employees report that it intensifies their workload. Researchers identified a specific phenomenon, AI brain fry, which is defined as mental fatigue resulting from the oversight of AI tools beyond an individual's cognitive capacity. Symptoms reported by the 1,488 US-based participants include mental fog, difficulty focusing, slower decision-making, and physical headaches.

The research highlights a distinction between burnout and this new form of acute mental strain. While using AI to replace repetitive tasks can lower burnout scores, the intensive management of multi-agent systems often increases cognitive load and exhaustion. This is exacerbated by corporate performance metrics, such as those used by Meta, that reward AI-generated output, such as lines of code or token consumption. As a consequence, workers find themselves toggling between numerous tools and managing complex workflows, leading to attention fatigue and a growing sense of overwhelm.

The study warns that AI-associated mental strain carries a high cost to organisations, including an increase in employee errors, decision fatigue, and a higher intention to quit. Although AI can alleviate chronic workplace stress when used to automate routine duties, its role as a manager of work creates a different type of exhaustion. The findings suggest that organisations must design AI workflows more thoughtfully to avoid exceeding human cognitive limits, even as AI use intensifies.

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