. Author manuscript; available in PMC: 2020 Mar 1.

Published in final edited form as: Transplantation. 2019 Mar;103(3):565–572. doi: 10.1097/TP.0000000000002349

Table 3.

Item Response Theory (IRT) Transplant Knowledge Item Parameters

Item	Difficulty 1 (b₁)	Difficulty 2 (b₂)	Discrimination (a)	Factor Loading
I1	-2.68	-0.17	0.83	0.44
I2	-5.65	-0.17	0.55	0.31
I3	-2.67	-1.51	0.94	0.48
I4	-2.27	0.51	0.65	0.36
I5	-2.20	-0.10	0.81	0.43
I6	-2.39	-0.77	0.83	0.44
I7	-3.27	-1.80	0.78	0.42
I8	-1.86	0.15	0.75	0.40
I9	-2.34	-0.56	0.88	0.46
I10	-3.20	0.48	0.77	0.41
I11	-1.50	0.76	1.21	0.58
I12	-3.01	1.17	0.81	0.43
I13	-1.55	1.18	1.00	0.51
I14	-1.68	0.48	1.21	0.58
I15	-0.91	1.65	1.14	0.56
I16	-1.76	-0.64	1.07	0.53
I17	-1.47	0.45	1.17	0.57