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Table 19 Questions’ difficulty and discrimination indices using IRT (test-one)

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

Q Difficulty index Discrimination index
1 Medium (-0.030) Moderate (0.986)
2 Very easy (-2.603) Low (0.484)
3 Easy (-1.800) Perfect (1.712)
4 Medium (-0.374) Moderate (1.043)
5 Difficult (0.837) Moderate (0.740)
6 Very difficult (7.354) Very low (0.071)
7 Medium (-0.131) Moderate (1.073)
8 Easy (-0.515) High (1.458)
9 Easy (-0.584) High (1.421)
10 Difficult (0.854) Moderate (0.972)
11 Very difficult (3.323) Moderate (0.779)
12 Medium (-0.133) High (1.500)
13 Medium (-0.391) Moderate (1.305)
14 Medium (0.072) Moderate (1.105)