University of Maryland Randomized Trial Finds Students Offered a GPT-4o Course Tutor Scored About Four Points Lower
A University of Maryland randomized trial covered 2,379 undergraduates and 30 instructors in fall 2025. In matched sections of the same course, students offered a course-integrated AI tutor finished about four percentage points lower in final grades, or 0.37 standard deviations, while learning management system participation fell 0.90 standard deviations and page views and active days also declined. About 15% of students offered the tutor used it, and nearly 74% of requests sought information, explanations or answers.
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