Table 3.

Item fit: study 1 (college sample)^a.

			Infit		Outfit
Item	Measure	Model SE	MNSQ	ZSTD	MNSQ	ZSTD
I know what health resources are available on the Internet.	−0.34	0.14	0.89	−0.80	0.8	−1.4
I know where to find helpful health resoures on the Internet.	0.74	0.15	0.84	−1.20	0.79	−1.2
I know how to find helpful health resources on the Internet.	0.06	0.16	1.16	1.20	1.12	0.9
I know how to use the Internet to answer my questions about health.	−0.16	0.15	0.99	0.0	0.91	−0.5
I know how to use the health information I find on the Internet to help me.	−0.54	0.14	0.90	−0.60	0.88	−0.7
I have the skills I need to evaluate the health resources I find on the Internet.	−0.15	0.14	1.06	0.50	1.05	0.4
I can tell high-quality health resources from low-quality health resources on the Internet.	0.07	0.12	1.16	1.20	1.12	0.9
I feel confident in using information from the Internet to make health decisions.	0.31	0.13	1.15	1.40	1.2	1.8

^aThis is a table showing item statistics and the fit of each of the items. There were no infit or outfit violations. The infit statistics are weighted to the performance of persons close to the item value. These individuals give a sensitive insight into the item’s performance. The outfit statistics are not weighted and are not sensitive to the influence of outlying scores.