Table 4.

NCDIF Recommended Effect Size—Moderate DIF: Category B (3PL).

Model →	3PL	3PL	3PL	3PL	3PL	3PL	3PL	3PL
Discrimination →	0.25	0.50	0.75	1.00	1.25	1.50	1.75	2.00
Difficulty ↓
−3	0.005	0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
−2	0.007	0.003	0.001	0.001	<0.001	<0.001	<0.001	<0.001
−1.5	0.008	0.005	0.003	0.002	0.001	0.001	<0.001	<0.001
−1	0.009	0.006	0.004	0.003	0.002	0.002	0.001	0.001
−0.5	0.010	0.008	0.006	0.005	0.004	0.003	0.003	0.003
0	0.011	0.009	0.008	0.007	0.006	0.005	0.005	0.004
0.5	0.011	0.010	0.009	0.008	0.007	0.007	0.006	0.006
1	0.011	0.009	0.008	0.008	0.007	0.007	0.006	0.006
1.5	0.010	0.009	0.008	0.007	0.007	0.007	*	*
2	0.010	0.008	0.007	*	*	*	*	*
3	0.009	*	*	*	*	*	*	*

Note. NCDIF = noncompensatory differential item functioning; DIF = differential item functioning.

^*MH never reached moderate DIF (Category B). Therefore, no corresponding NCDIF value is reported.