学習者向けAIツール、ChatGPTより学習効果を向上(AI tool built for learners supports learning better than ChatGPT)

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2025-09-08 コペンハーゲン大学(UCPH)

コペンハーゲン大学の研究チームは、学習者の理解を深めることを目的に設計されたAIツール「ChatTutor」を開発し、汎用AIのChatGPTと比較する実験を行った。MITの研究では、ChatGPT使用時に脳活動が低下し学習効果が減る可能性が示されていたが、ChatTutorは学習理論に基づき、教師のように理解度を把握し、考えを促す質問を投げかける仕組みを備えている。大学生175名と高校生234名を対象に行った実験では、ChatTutor利用者はChatGPTやAI非使用の学生より学習量が多く、満足度や再利用意欲も高かった。単なる答え提示ではなく、反省や深い認知処理を誘発する設計が有効であることが確認された。研究成果は『Educational Psychology Review』に発表され、AIは解答生成ではなく学びを支援する役割に用いるべきだと結論づけている。

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「驚き」を超えた活用:生成AIによる創造的意味構築の促進 Beyond the “Wow” Factor: Using Generative AI for Increasing Generative Sense-Making

Guido Makransky,Ban M. Shiwalia,Tue Herlau & Steven Blurton
Educational Psychology Review  Published:16 June 2025
DOI:https://doi.org/10.1007/s10648-025-10039-x

学習者向けAIツール、ChatGPTより学習効果を向上(AI tool built for learners supports learning better than ChatGPT)

Abstract

Generative artificial intelligence (GenAI) has emerged as a transformative tool in education, offering scalable individualized learning. However, there is a lack of theoretically informed and methodologically rigorous research on how GenAI can effectively augment learning. This manuscript addresses this gap by investigating the potential of a theory-informed GenAI chatbot, ChatTutor—designed for students—to facilitate generative sense-making by leveraging principles from generative learning theory. The study aimed to (1) extend theory by proposing how GenAI can support generative sense-making and (2) test its effects on conceptual knowledge, self-efficacy, and trust post-use and on conceptual knowledge, enjoyment, and behavioral intentions in a delayed follow-up. We conducted two between-subjects design experiments. Study 1 was a pre-registered experiment with 175 university students in an authentic cognitive psychology course, comparing ChatTutor with a generic GenAI system (ChatGPT) and a teaching-as-usual control. Study 2 replicated the design with 234 high school students, comparing ChatTutor to ChatGPT, and a re-study control. Results showed that ChatTutor significantly enhanced trust and enjoyment in both studies, and behavioral intentions in Study 1, compared to ChatGPT. It also improved conceptual knowledge over ChatGPT immediately in both studies and at follow-up in Study 2. ChatTutor outperformed the control condition in conceptual knowledge, although this difference was only significant in the follow-up of Study 1 and the immediate test of Study 2. Differences in self-efficacy were not significant. The research underscores the importance of integrating human-centered design and educational psychology theories into GenAI applications and offers directions for future research and practice.

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