Table 5.

Kendall's W for 1,000 replications between the ordering based on the population test-score reliability and the ordering produced by the three item-score reliability methods and the corrected item-total correlation (CITC), for the bottom-up and the top-down procedure in the six different conditions.

	N = 200			N = 1, 000
	Small variance	Average variance	Large variance	Small variance	Average variance	Large variance
	of α	of α	of α	of α	of α	of α
BOTTOM-UP PROCEDURE
Method MS	0.53	0.79	0.90	0.80	0.92	0.96
Method λ6	0.65	0.87	0.92	0.91	0.97	0.98
Method CA	0.69	0.89	0.95	0.91	0.97	0.99
CITC	0.69	0.89	0.95	0.91	0.97	0.99
TOP-DOWN PROCEDURE
Method MS	0.37	0.65	0.80	0.61	0.77	0.85
Method λ6	0.53	0.82	0.89	0.88	0.96	0.98
Method CA	0.59	0.85	0.93	0.88	0.96	0.98
CITC	0.59	0.85	0.93	0.88	0.96	0.98