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A study by MIT, Stanford, NYU, and Princeton found that while people expect AI to save time on simple tasks, it actually reduces perceived effort rather than completion time, due to a 'speedup illusion'. The study was limited to short tasks under 5 minutes, so findings may not apply to complex, expert workflows.
This paper investigates mismatches between expected and actual time savings when using LLMs for simple cognitive tasks, revealing a speedup illusion where users underestimate AI-assisted completion times despite no actual speedup.