From Calculation to Adjudication: Examining LLM judges on Mathematical Reasoning Tasks

• URL: http://arxiv.org/abs/2409.04168v1
• Date: Fri, 6 Sep 2024 10:09:41 GMT
• Title: From Calculation to Adjudication: Examining LLM judges on Mathematical Reasoning Tasks
• Authors: Andreas Stephan, Dawei Zhu, Matthias Aßenmacher, Xiaoyu Shen, Benjamin Roth,
• Abstract summary: We study large language models (LLMs) on mathematical reasoning tasks. Our analysis uncovers a strong correlation between judgment performance and the candidate model task performance. We show that it is possible to use statistics, such as the task performances of the individual models, to predict judgment performance.
• Score: 11.01213914485374
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: To reduce the need for human annotations, large language models (LLMs) have been proposed as judges of the quality of other candidate models. LLM judges are typically evaluated by measuring the correlation with human judgments on generation tasks such as summarization or machine translation. In contrast, we study LLM judges on mathematical reasoning tasks. These tasks require multi-step reasoning, and the correctness of their solutions is verifiable, enabling a more objective evaluation. We perform a detailed performance analysis and find that the used judges are mostly unable to improve task performance but are able to pick the better model. Our analysis uncovers a strong correlation between judgment performance and the candidate model task performance. We observe that judges tend to choose the model of higher quality even if its answer is incorrect. Further, we show that it is possible to use statistics, such as the task performances of the individual models, to predict judgment performance. In an ablation, we either swap or mask the candidate answers and observe that judges often keep the original judgment, providing evidence that judges incorporate writing style in their judgments. In summary, we find that regularities in the judgments are quantifiable using statistical measures and provide various angles on exploiting them.

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