Concept-based Rubrics Improve LLM Formative Assessment and Data Synthesis

• URL: http://arxiv.org/abs/2504.03877v1
• Date: Fri, 04 Apr 2025 19:02:07 GMT
• Title: Concept-based Rubrics Improve LLM Formative Assessment and Data Synthesis
• Authors: Yuchen Wei, Dennis Pearl, Matthew Beckman, Rebecca J. Passonneau,
• Abstract summary: Formative assessment in STEM topics aims to promote student learning by identifying students' current understanding, thus targeting how to promote further learning.<n>Previous studies suggest that the assessment performance of current generative large language models (LLMs) on constructed responses to open-ended questions is significantly lower than that of supervised classifiers trained on high-quality labeled data.<n>We demonstrate that concept-based rubrics can significantly enhance LLM performance, which narrows the gap between LLMs as off-the shelf assessment tools, and smaller supervised models, which need large amounts of training data.
• Score: 3.0748861313823
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Formative assessment in STEM topics aims to promote student learning by identifying students' current understanding, thus targeting how to promote further learning. Previous studies suggest that the assessment performance of current generative large language models (LLMs) on constructed responses to open-ended questions is significantly lower than that of supervised classifiers trained on high-quality labeled data. However, we demonstrate that concept-based rubrics can significantly enhance LLM performance, which narrows the gap between LLMs as off-the shelf assessment tools, and smaller supervised models, which need large amounts of training data. For datasets where concept-based rubrics allow LLMs to achieve strong performance, we show that the concept-based rubrics help the same LLMs generate high quality synthetic data for training lightweight, high-performance supervised models. Our experiments span diverse STEM student response datasets with labels of varying quality, including a new real-world dataset that contains some AI-assisted responses, which introduces additional considerations.

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