Abstract
As an assessment method based on a social constructivist approach, peer assessment has become popular in recent years. When the number of learners increases as in MOOCs, peer assessment is often conducted by dividing learners into multiple groups to reduce the learner’s assessment workload. However, in this case, a difficulty remains that the assessment accuracies of learners in each group depends on the assigned rater. To solve that problem, this study proposes a group optimization method to maximize peer assessment accuracy based on item response theory using integer programming. Experimental results, however, showed that the proposed method does not necessarily present higher accuracy than a random group formation. Therefore, we further propose an external rater selection method that assigns a few outside-group raters to each learner. Simulation and actual data experiments demonstrate that introduction of external raters using the proposed method improves the peer assessment accuracy considerably.
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Uto, M., Thien, N.D., Ueno, M. (2017). Group Optimization to Maximize Peer Assessment Accuracy Using Item Response Theory. In: André, E., Baker, R., Hu, X., Rodrigo, M., du Boulay, B. (eds) Artificial Intelligence in Education. AIED 2017. Lecture Notes in Computer Science(), vol 10331. Springer, Cham. https://doi.org/10.1007/978-3-319-61425-0_33
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DOI: https://doi.org/10.1007/978-3-319-61425-0_33
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