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Table 6 Comparison of Four-Option and Three-Option Tests Generated by Random Redistribution of Fourth Option

From: An assessment of functioning and non-functioning distractors in multiple-choice questions: a descriptive analysis

 

Mean test score % (SD)

Range of test scores (%)

KR20 Reliability

 

4-options

3-options

4-options

3-options

4-options

3-options

Test A

67.4 (10.04)

69.2 (9.46)

38–90

38–90

.81

.80

Test B

55.4 (8.84)

56.1 (8.61)

33–71

35–71

.71

.70

Test C

69.2 (10.44)

70.1 (9.86)

38–90

41–90

.82

.79

Test D

71.9 (10.82)

72.5 (10.70)

46–94

46–94

.71

.69

Test E

64.2 (8.35)

64.9 (8.21)

46–84

46–84

.73

.70

Test F

67.9 (10.02)

69.1 (9.79)

35–88

35–90

.70

.69

Test G

65.6 (11.29)

66.6 (10.80)

34–89

36–89

.87

.85

Total (mean)

(65.9)

(66.9)

--

--

(0.76)

(0.75)