Better
Understand
Student
Learning
Jiguang Li
Motivations
Item Response
Theory
Experiment 1
Experiment 2
Experiment 3
Experiment 4
Experiment 5
Experiment 6
Conclusions
Appendix
Experiment 4: Hierarchical PMIRT Result
Table: Rank-order Correlation Comparison in the Test Set
Model Rank-Order Correlation 95%CI
Baseline 0.87672 (0.87266, 0.88058)
IRT 0.88040 (0.87637, 0.88416)
MIRT2 0.87877 (0.87477, 0.88256)
MIRT3 0.88120 (0.87727, 0.88491)
MIRT4 0.87522 (0.87108, 0.87908)
PMIRT2 0.88143 (0.87744, 0.88520)
PMIRT3 0.88206 (0.87807, 0.88581)
PMIRT4 0.88203 (0.87806, 0.88578)
treemodel3 0.88124 (0.87724, 0.88498)
treemodel4 0.88195 (0.87796, 0.88570)
binarytree3 0.88129 (0.87729, 0.88504)
binarytree7 0.88190 (0.87789, 0.88565)