Table 3.

Version 1 knowledge exam item difficulty and discrimination

Item #	Content domain	Item Difficulty	Item Discrimination
1	EBP overview and clinical application *	0.27	0.10
2	Asking answerable questions, finding evidence	0.72	0.34
3	Critical evaluation of therapy articles	0.24	0.08
4	Research study design and validity overview	0.76	0.32
5	Asking answerable questions, finding evidence	0.74	0.41
6	Research study design and validity overview	0.28	0.26
7	Asking answerable questions, finding evidence	0.41	0.40
8	Critical evaluation of diagnostic studies	0.69	0.38
9	Critical evaluation of diagnostic studies	0.19	0.04
10	Overview of clinical biostatistics	0.53	0.32
11	Critical evaluation of diagnostic studies	0.25	0.17
12	Overview of clinical biostatistics	0.60	0.38
13	Research study design and validity overview	0.39	0.34
14	Critical evaluation of systematic reviews/guidelines	0.48	0.36
15	Critical evaluation of systematic reviews/guidelines	0.75	0.33
16	Critical evaluation of diagnostic studies	0.34	0.31
17	Critical evaluation of diagnostic studies	0.50	0.42
18	EBP overview and clinical application	0.73	0.45
19	Critical evaluation of therapy articles	0.24	0.32
20	Introduce practice guidelines into your clinic*	0.76	0.49

^*items dropped in next revision