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Table 20 Questions’ difficulty and discrimination indices using IRT (test-two)

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

Question Difficulty index Discrimination index
1 Easy (-1.81) Very low (0.18)
2 Very easy (-2.23) Low (0.49)
3 Easy (-0.99) Very low (0.19)
4 Very easy (-10.33) Very low (0.11)
5 Difficult (0.66) Low (0.43)
6 Medium (0.42) Moderate (0.89)
7 Very easy (-8.44) Very low (0.05)
8 Difficult (1.16) Moderate (0.86)
9 Medium (0.28) Moderate (1.22)
10 Medium (-0.29) Very low (0.32)
11 Difficult (1.87) Low (0.52)
12 Easy (-1.66) Moderate (0.84)
13 Medium (0.02) Perfect (2.75)
14 Easy (-1.5) Low (0.35)
15 Easy (-0.98) Low (0.63)
16 Medium (-0.01) High (1.48)