Reason to Play: Behavioral and Brain Alignment Between Frontier LRMs and Human Game Learners

• URL: http://arxiv.org/abs/2605.08019v1
• Date: Fri, 08 May 2026 17:07:41 GMT
• Title: Reason to Play: Behavioral and Brain Alignment Between Frontier LRMs and Human Game Learners
• Abstract summary: Humans rapidly learn abstract knowledge when encountering novel environments.<n>Can modern AI systems learn and plan in a similar way?<n>We study this question using a dataset of complex human gameplay with concurrent fMRI recordings.
• Score: 35.67021004974861
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Humans rapidly learn abstract knowledge when encountering novel environments and flexibly deploy this knowledge to guide efficient and intelligent action. Can modern AI systems learn and plan in a similar way? We study this question using a dataset of complex human gameplay with concurrent fMRI recordings, in which participants learn novel video games that require rule discovery, hypothesis revision, and multi-step planning. We jointly evaluate models by their ability to play the games, match human learning behavior, and predict brain activity during the same task, comparing a suite of frontier Large Reasoning Models (LRMs) against model-free and model-based deep reinforcement learning agents and a Bayesian theory-based agent. We find that frontier LRMs most closely match human behavioral patterns during game discovery and predict brain activity an order of magnitude better than both reinforcement learning alternatives across cortical and subcortical regions, with effects robust to permutation controls. Through targeted manipulations, we further show that brain alignment reflects the model's in-context representation of the game state rather than its downstream planning or reasoning. Our results establish LRMs as compelling computational accounts of human learning and decision making in complex, naturalistic environments. Project page with interactive replays: https://botcs.github.io/reason-to-play/

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