Language Testing in Asia

Table 2 Item and item pair scalability coefficients and their standard errors

From: C-Test construct validity: Evidence from nonparametric item response theory

	Item1	Item2	Item3	Item4	Item5	Item6
Item1		0.883 (0.023)	0.830 (0.023)	0.847 (0.021)	0.875 (0.022)	0.872 (0.022)
Item2			0.878 (0.022)	0.899 (0.018)	0.877 (0.021)	0.853 (0.029)
Item3				0.880 (0.018)	0.926 (0.014)	0.894 (0.023)
Item4					0.927 (0.013)	0.904 (0.021)
Item5						0.888 (0.029)
Item6
H_i (SE)	0.860 (0.016)	0.877 (0.016)	0.883 (0.013)	0.892 (0.011)	0.900 (0.014)	0.884 (0.022)

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