Table 6 Question difficulty and discrimination with four and three distractors

Chem A

(n = 15)^a

.78 ± .14

.41 ± .16

.77 ± .14

.41 ± .18

−.012

(.06)

.01

(.67)

Chem B

(n = 27)^a

.66 ± .17

.49 ± .17

.65 ± .16

.49 ± .14

−.012

(.45)

−.00

(.88)

A&P A

(n = 20)^a

.70 ± .17

.46 ± .19

.72 ± .17

.42 ± .16

.025

(.01)

−.04

(.07)

A&P B

(n = 21)^aa

.67 ± .18

.43 ± .15

.65 ± .17

.41 ± .13

−.016

(.27)

−.01

(.53)

All courses

(n = 83)

.69 ± .17

.45 ± .17

.69 ± .17

.44 ± .15

−.004

(.56)

−.01

(.24)