AI Users Busier While Cognitive Skills Decline: Studies
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- ActivTrak research on 10,000+ workers found AI adopters more than doubled time on email, messaging, and chat apps and increased business software use by 94%, while time on focused, uninterrupted work fell 9% — fueling a state the researchers call "AI brain fry"
- UC Berkeley's Haas School of Business found workers used AI to take on tasks like coding and engineering they had previously outsourced, squeezing work bursts into evenings, weekends, and waiting rooms while multitasking across multiple bots
- MIT Media Lab researchers led by Nataliya Kosmyna found brain connectivity declines by as much as 55% when people use ChatGPT to perform comparable tasks, and Vivienne Ming of Possibility Sciences reported gamma-wave activity drops roughly 40% during AI use
- Carnegie Mellon researchers led by Grace Liu found that after roughly 10 minutes of AI-assisted problem solving, people who lost access performed worse and gave up more frequently than those who had never used the AI
- Endoscopy physicians studied in a separate trial dropped from locating precancerous intestinal lesions in 28.4% of colonoscopies before AI to 22.4% after AI was removed — a 6-point decline in detection skill
- In a Wharton study, humans accepted an AI's deliberately wrong answers as true 80% of the time, exemplifying what the writer calls "cognitive surrender," and a GoTo survey found 43% of workers had submitted AI-generated content they suspected was low-quality or erroneous
- The author frames the emerging divide not as smart versus less smart but as "productive passengers" who let AI diminish their mental capacities versus those who "actively wrestle with AI to develop their own mental capabilities" — encapsulated in the thesis that "when intelligence is plentiful, volition is valuable."
Why it matters: For workers and managers, the research undercuts the popular narrative that AI frees up time — workloads doubled while cognitive skills visibly eroded after minimal exposure, with endoscopy physicians losing 6 points of lesion-detection accuracy once AI was removed from their workflow.
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