Table 6.

Descriptive Statistics of Test Lengths Using the DINO Model.

		PWKL				MPWKL				GDI
Item quality	π(αc|Xi)	Minimum	Maximum	M	CV	Minimum	Maximum	M	CV	Minimum	Maximum	M	CV
HD-LV	0.65	3	24	8.37	0.28	3	24	6.89	0.15	3	19	6.83	0.15
	0.75	3	27	9.08	0.28	4	27	7.58	0.18	4	21	7.58	0.18
	0.85	3	29	10.32	0.27	4	28	8.91	0.19	4	23	8.89	0.19
	0.95	4	34	12.23	0.25	4	30	11.09	0.20	4	27	11.04	0.20
HD-HV	0.65	2	17	7.78	0.23	2	10	6.60	0.11	2	10	6.53	0.11
	0.75	3	18	8.04	0.22	3	13	6.71	0.10	3	10	6.60	0.11
	0.85	3	22	8.61	0.23	3	14	7.24	0.10	3	11	6.80	0.10
	0.95	3	26	9.51	0.22	3	17	8.10	0.10	3	20	7.66	0.11
LD-LV	0.65	4	49	13.73	0.35	5	40	11.88	0.29	5	37	11.85	0.29
	0.75	4	50	15.43	0.34	6	43	13.61	0.29	6	43	13.61	0.29
	0.85	5	59	17.41	0.33	6	57	15.57	0.30	6	62	15.60	0.30
	0.95	5	67	21.83	0.31	7	69	20.10	0.29	7	68	20.07	0.29
LD-HV	0.65	3	32	10.45	0.31	4	24	8.81	0.23	4	24	8.75	0.23
	0.75	4	33	11.79	0.30	5	36	10.18	0.25	5	29	10.08	0.25
	0.85	4	36	13.45	0.30	5	36	12.13	0.24	5	42	12.11	0.25
	0.95	5	45	15.75	0.28	6	40	14.40	0.25	6	43	14.35	0.26

Note. DINO = deterministic input, noisy “or” gate; PWKL = posterior-weighted Kullback–Leibler index; MPWKL = modified posterior-weighted Kullback–Leibler index; GDI = G-DINA model discrimination index; G-DINA = generalized DINA; DINA = deterministic inputs, noisy “and” gate; CV = coefficient of variation; HD-LV = high discrimination–low variance; HD-HV = high discrimination–high variance; LD-LV = low discrimination–low variance; LD-HV = low discrimination–high variance.