BehaviorBench: Benchmarking Foundation Models for Behavioral Science Tasks
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Computer Science > Computation and Language
arXiv:2606.24162 (cs)
[Submitted on 23 Jun 2026]
Title:BehaviorBench: Benchmarking Foundation Models for Behavioral Science Tasks
Authors:Jin Huang, Yutong Xie, Wanli Song, Xingjian Zhang, Walter Yuan, Matthew O. Jackson, Qiaozhu Mei
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Abstract:Foundation models have been increasingly applied to behavioral science domains such as psychology, sociology, and economics. While these models show promise in individual tasks such as survey response prediction and human-subject experiment simulation, there remains no systematic understanding of how well they perform across diverse behavioral science tasks, contexts, and populations. We introduce BehaviorBench, a comprehensive benchmark that evaluates foundation models along four core capabilities: (1) behavior prediction and simulation, (2) strategic decision-making, (3) subject-trait inference, and (4) behavioral knowledge application. Crucially, BehaviorBench evaluates model outputs at both the individual and distributional levels, capturing not only per-subject accuracy but also population-level alignment, an essential requirement for behavioral validity. Leveraging the tasks in BehaviorBench, we further develop this http URL-1.5, extending the this http URL family of behavioral foundation models fine-tuned on behavioral data. Our results reveal a considerable gap: proprietary general-purpose models excel at individual-level prediction and knowledge-intensive tasks, whereas behavioral foundation models, fine-tuned on behavioral data, achieve substantially stronger distributional alignment. Notably, this http URL-1.5 leads on distributional metrics and remains competitive on individual-level metrics, suggesting that proper behavioral adaptation can close the gap. Our results highlight the importance of distributional evaluation, establish BehaviorBench as a foundation for developing and assessing behaviorally aligned AI systems, and demonstrate this http URL-1.5's potential for a broad range of behavioral science studies. Our BehaviorBench and this http URL-1.5 models can be accessed via this https URL.
| Subjects: | Computation and Language (cs.CL); Machine Learning (cs.LG) |
| Cite as: | arXiv:2606.24162 [cs.CL] |
| (or arXiv:2606.24162v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2606.24162
arXiv-issued DOI via DataCite (pending registration)
|
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