# A 26,000-student study finds AI's learning cost takes two years to surface

> The unsettling part of this study is not that AI helped with homework, it is that the damage from over-relying on it was invisible for months and only showed up once students had to perform without a tool in the room. Schools rushing to adopt AI tutors on the strength of short-term score bumps are flying blind on exactly the timescale that matters most. This is a case where the good headline number and the true cost live years apart, and anyone designing ed-tech policy should be asking for longitudinal data, not semester snapshots.

_Section: [Daily AI Updates](https://www.wortins.com/daily-ai) · Source: The Decoder · Published Sunday, July 5, 2026_

## Wortins' read

The unsettling part of this study is not that AI helped with homework, it is that the damage from over-relying on it was invisible for months and only showed up once students had to perform without a tool in the room. Schools rushing to adopt AI tutors on the strength of short-term score bumps are flying blind on exactly the timescale that matters most. This is a case where the good headline number and the true cost live years apart, and anyone designing ed-tech policy should be asking for longitudinal data, not semester snapshots.

## Source

[Read the full story at The Decoder](https://the-decoder.com/a-26000-student-study-shows-ais-hidden-learning-cost-takes-two-full-years-to-surface/)

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_Curated and written by [Wortins](https://www.wortins.com) — The daily AI briefing. Every story links to its original source; the "Wortins read" on each is our own original analysis. [About Wortins & our editorial approach](https://www.wortins.com/about)._