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Effectiveness of Intelligent Tutoring Systems

2015/04/17 by James A. Kulik, J. D. Fletcher · 1 voice · 812 citations
Computer Science · Mathematics · Psychology · #Artificial intelligence #Computer science #Control (management) #Implementation #Innovative Teaching and Learning Methods #Intelligent Tutoring Systems and Adaptive Learning #Intelligent decision support system #Intelligent tutoring system #Machine learning #Mathematics #Online Learning and Analytics #Percentile #Software engineering #Statistics #Test (biology)

paper · doi:10.3102/0034654315581420

published in Review of Educational Research 86(1), 42-78 (SAGE Publishing)

openalex publication_date 2015/04/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

This review describes a meta-analysis of findings from 50 controlled evaluations of intelligent computer tutoring systems. The median effect of intelligent tutoring in the 50 evaluations was to raise test scores 0.66 standard deviations over conventional levels, or from the 50th to the 75th percentile. However, the amount of improvement found in an evaluation depended to a great extent on whether improvement was measured on locally developed or standardized tests, suggesting that alignment of test and instructional objectives is a critical determinant of evaluation results. The review also describes findings from two groups of evaluations that did not meet all of the selection requirements for the meta-analysis: six evaluations with nonconventional control groups and four with flawed implementations of intelligent tutoring systems. Intelligent tutoring effects in these evaluations were small, suggesting that evaluation results are also affected by the nature of control treatments and the adequacy of program implementations.

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