Test-level and Item-level Model Fit Comparison of General vs. Specific Diagnostic Classification Models: A Case of True DCM

Language Testing in Asia

Table 2 Item-level fit indices for initial and final Q-matrices

		Mean[stats]	Max[stats]	Max[z.stats]	p value	Adj. p value
Initial Q-matrix	Proportion correct	00.01	0.0034	0.2907	0.7713	1
	Transformed correlation	0.313	0.2197	9.2443	0.0000	0
	Log odds ratio	0.1410	0.9237	8.6813	0.0000	0
Final Q-matrix	Proportion correct	0.0012	0.0041	0.3764	0.7066	1
	Transformed correlation	0.0258	0. 0928	3.9027	0.0001	0.669
	Log odds ratio	0.1142	0.4625	3.7646	0.0002	0.1173