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Table 4 Relationship between Number of Functioning Distractors and Point-Biserial Correlation Coefficient

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

 

None

One

Two

Three

r

Test A

.09

.19

.25

.28***

0.44**

Test B

.06

.18

.24

.36*

0.35**

Test C

.10

.22

.31

.36***

0.53***

Test D

.17

.21

.28

.40*

0.45**

Test E

.09

.12

.33

.38***

0.64***

Test F

.14

.23

.26

.38

0.32*

Test G

.24

.22

.29

.36*

0.28**

  1. * p < .05
  2. ** p < .01
  3. *** p < .001