Table 1.

Discrimination index^a.

Domain (questions, n)	Question 1	Question 2	Question 3-1	Question 3-2	Question 3-3	Question 3-4
Medical interview or professionalism (8)	0.48	0.38	0.94	0.74	0.30	0.61
Clinical diagnosis (18)	0.50	0.40	0.77	0.56	0.27	0.18
Physical examination or procedure (18)	0.52	0.35	0.39	0.19	0.22	0.39
Disease knowledge (36)	–0.09	0.58	0.13	0.04	0.27	–0.10
Total (80)	0.06	0.47	0.10	–0.06	0.01	–0.12
Question type	MCb	FDc	FD	FD	FD	FD

^aA discrimination index of ≥0.20 indicates that the question had high discriminatory power; a discrimination index of >0.40 indicates that the question was a very good measure of the participant’s qualifications.

^bMC: multiple choice.

^cFD: free description (<100 words).