InFoBench: Evaluating Instruction Following Ability in Large Language Models
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Summary
Judging whether large language models obey user instructions usually relies on pairwise A/B comparisons, Elo ratings or a single holistic score. These approaches scale poorly and rarely explain why a response falls short. The authors propose DRFR (Decomposed Requirements Following Ratio). Each instruction is split into several yes/no checks, and a model's score is the share of all checks it passes. Even a small deviation counts as a failure. To apply the metric, they built InFoBench, which has two parts: an Easy Set based on the instruction collection of Wang et al. (2022) and a newly written, manually curated Hard Set. On a human-annotated subset, DRFR gave higher inter-annotator agreement than direct scoring, most clearly on hard items. The authors compared domain experts, Amazon Mechanical Turk workers and GPT-4 as annotators. GPT-4 with a structured multi-turn prompt proved accurate, cheap and fast, so it was used to grade six LLMs. Closed-source systems led, but every model struggled with complex instructions. The work offers an interpretable, scalable recipe for evaluating instruction following.
Key points
- InFoBench contains 500 instructions paired with 2,250 binary decomposed questions. Easy Set instructions carry only about three constraints each and are often ambiguous, which motivated the harder, more diverse Hard Set.
- Each decomposed question is tagged with one of five constraint categories: Content, Linguistic, Style, Format and Number.
- DRFR is computed as the sum of satisfied requirements (r_i,j) divided by the total number of requirements (Σ m_i) across the dataset.
- Human annotation covered only 50 instructions (10% of the set). Experts were the most accurate but expensive and slow. AMT workers were cheaper but less precise. GPT-4 combined accuracy with low cost and speed.
- In the evaluation of six LLMs, closed-source models came out ahead, with notable weaknesses on numerical and linguistic constraints. Code and data are available at github.com/qinyiwei/InfoBench.
Cited by
Cite
@inproceedings{qin2024infobench,
title = {{InFoBench: Evaluating Instruction Following Ability in Large Language Models}},
author = {Qin, Yiwei and Song, Kaiqiang and Hu, Yebowen and Yao, Wenlin and Cho, Sangwoo and Wang, Xiaoyang and Wu, Xuansheng and Liu, Fei and Liu, Pengfei and Yu, Dong},
booktitle = {Findings of the Association for Computational Linguistics: ACL 2024},
year = {2024},
doi = {10.18653/v1/2024.findings-acl.772},
url = {https://doi.org/10.18653/v1/2024.findings-acl.772}
}References
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