Interpreting Latent Student Knowledge Representations in Programming Assignments

• URL: http://arxiv.org/abs/2405.08213v1
• Date: Mon, 13 May 2024 22:01:03 GMT
• Title: Interpreting Latent Student Knowledge Representations in Programming Assignments
• Authors: Nigel Fernandez, Andrew Lan,
• Abstract summary: We present an Information regularized Open-ended Item Response Theory model, which encourages latent student knowledge states to be interpretable. In this paper, we show that InfoOIRT can both accurately generate student code and lead to interpretable student knowledge representations.
• Score: 2.184775414778289
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recent advances in artificial intelligence for education leverage generative large language models, including using them to predict open-ended student responses rather than their correctness only. However, the black-box nature of these models limits the interpretability of the learned student knowledge representations. In this paper, we conduct a first exploration into interpreting latent student knowledge representations by presenting InfoOIRT, an Information regularized Open-ended Item Response Theory model, which encourages the latent student knowledge states to be interpretable while being able to generate student-written code for open-ended programming questions. InfoOIRT maximizes the mutual information between a fixed subset of latent knowledge states enforced with simple prior distributions and generated student code, which encourages the model to learn disentangled representations of salient syntactic and semantic code features including syntactic styles, mastery of programming skills, and code structures. Through experiments on a real-world programming education dataset, we show that InfoOIRT can both accurately generate student code and lead to interpretable student knowledge representations.

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