Rohan Paul@rohanpaul_ai

2026-07-05 02:01·4小时前

AI 摘要

MIT、斯坦福、纽约大学、普林斯顿联合研究（arXiv:2605.23177）发现，人们预期AI能将简单任务时间缩短约69秒，但实际1237名参与者测试中，AI并未显著减少总完成时间。这种“速度错觉”源于人们能较好预估自己单独耗时，却严重低估AI辅助所需时间。AI在较难任务（如长文本总结或编辑）上确有帮助，但对简单任务作用有限。关键悖论：AI让任务感觉更轻松，即使它并未让任务更快。研究局限性：所用任务均可在5分钟内完成，且参与者为众包工人一次性操作。

This MIT， Stanford， New York Univ， Princeton， study shows that while people expected AI to save time on simple tasks， but it mostly saved effort instead.

Across 1，237 people， participants predicted that AI help would cut about 69 seconds from task time.

In the real task group， AI help did not meaningfully reduce total completion time overall.

The gap came from a speedup illusion， where people judged their own solo time fairly well but badly underestimated AI-assisted time.

AI did help on some harder tasks， such as longer summarizing or editing， but it did not help much on easy tasks.

The important twist is that AI made tasks feel easier， even when it did not make them faster.

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To note， the biggest limitation is that this study used short， simple tasks that could be finished in under 5 minutes， so it does not test long report reading， synthesis， cross-checking， and analysis work where AI can compress hours into minutes.

It also used crowdworkers doing one-off tasks in a controlled setting， so it misses expert users with strong prompting habits， personal context， repeated workflows， and clear business goals， where gains can be much larger.

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arxiv. org/abs/2605.23177

Title： "Cognitive offloading and the speedup illusion in human-AI interaction"

Rohan Paul@rohanpaul_ai · X

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