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Case study / Aug 5, 2025

AI sees through question quality

Evaluating the validity of exam questions required specialized judgment, and creating and verifying questions took a great deal of time and effort. In particular, differences in question-writing experience and inconsistent evaluation criteria made it hard to maintain consistent judgment, raising concerns about the risk of misjudgment.

Illustration depicting inconsistency in evaluation criteria

Project overview

Challenge

Evaluating the validity of exam questions required specialized judgment, and creating and verifying questions took a great deal of time and effort.

Learn more about Challenge

Challenge

Evaluating the validity of exam questions required specialized judgment, and creating and verifying questions took a great deal of time and effort.

In particular, differences in question-writing experience and inconsistent evaluation criteria made it hard to maintain consistent judgment, raising concerns about the risk of misjudgment.

Approach

Based on past questions and expert guidelines, an LLM automatically judges the validity of exam questions.

It also automatically generates explanatory text to support each judgment, achieving both transparency and explainability.

Built a mechanism that achieves stable quality control without relying on subjective judgment.

Illustration depicting automatic judgment of exam question validity

Outcomes

Greatly reduced the effort required for creating and verifying questions, easing the burden on educators.

By reducing variation in judgment, established a structure that maintains objective, consistent quality.

Illustration depicting reduced burden on educators
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