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Table 1 Particulars and psychometrics of the 7 BAQ tests with 50 items each

From: How important is distractor efficiency for grading Best Answer Questions?

Test Year St
n
Type Mean
DIFi (SD)
Mean
DISi (SD)
Items with 100% DE Items with DE of ≥ 50% Mean
FD (SD)
1 2013-14 87 FPE 5-op 0.60 (0.25) 0.22 (0.16) 6 (12%) 32 (64%) 2.1 (1.07)
2 2014-15 121 FPE 5-op 0.65 (0.23) 0.22 (0.16) 6 (12%) 34 (68%) 1.96 (1.20)
3 2015-16 125 FPE 5-op 0.69 (0.25) 0.17 (0.14) 5 (10%) 30 (60%) 1.94 (1.24)
4 2016-17 112 FPE 5-op 0.53 (0.28) 0.14 (0.13) 8 (16%) 34 (68%) 2.16 (1.2)
5 2016-17 24 Sup 5-op 0.54 (0.25) 0.16 (0.20) 1 (2%) 30 (60%) 1.72 (0.95)
6 2017-18 118 FPE 5-op 0.63 (0.28) 0.18 (0.15) 3 (6%) 27 (54%) 1.72 (1.23)
7 2018-19 122 FPE 4-op 0.69 (0.23) 0.12 (0.12) 8 (16%) 25 (50%) 1.48 (0.97)
  1. FPE final professional examination, op options, DE distractor efficiency, FD functional distractors per item, DIFi difficulty index, DISi discrimination index, St students, number. Items with ≥ 50% DE include items with 100% DE