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Table 21 Questions’ difficulty and discrimination indices using IRT (test-three)

From: Evaluating the quality of the ontology-based auto-generated questions

Question Difficulty index Discrimination index
1 Very easy (-2.51) Low (0.37)
2 Very easy (-3.32) Very low (0.19)
3 Very easy (-2.06) Low (0.62)
4 Easy (-1.51) Low (0.42)
5 Easy (-0.76) Moderate (1.17)
6 Medium (0.09) Moderate (0.70)
7 Difficult (0.88) Moderate (0.87)
8 Medium (0.31) Moderate (1.08)
9 Easy (-1.48) Moderate (1.17)
10 Easy (-0.99) Moderate (0.86)
11 Very difficult (6.10) Very low (0.18)
12 Difficult (0.60) Moderate (1.18)
13 Medium (0.38) Moderate (1.04)
14 Easy (-1.05) Moderate (1.32)