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Table 3 Classical analysis and Rasch model parameters for both tests

From: Evidence of probability misconception in engineering students—why even an inaccurate explanation is better than no explanation

Task Classical analysis Rasch model
Task difficulty Index of discrimination Task difficulty
Test 1 Test 2 Test 1 Test 2 Both tests together
Maternity hospital 0.19   0.25   1.39
Lotto 0.40 0.30 0.38 0.36 0.60
Mobile phones 0.20   0.35   1.33
IT engineer 0.27 0.36 0.38 0.31 0.76
R/W balls   0.10   0.20 2.02
Lawyer   0.06   0.26 2.56