arXiv Computation and Language By S M Masrur Ahmed, Jaspal Subhlok

Cite or Decline: A Strict Course-Grounded Chatbot for STEM Lecture Videos

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The paper presents a semester-long deployment of the VideoPoints platform, featuring a retrieval‑augmented chatbot that answers questions using only the active course’s lecture materials and provides clickable, timestamped citations. Across 833 interactions, 70.5% of messages included citations, no cross‑course references were made, and the bot declined to answer when no lecture evidence matched. The study also shows that the system improves correct‑lecture retrieval by 6.3 percentage points over dense‑only retrieval on the EduVidQA benchmark.

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arXiv AI
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