Table of Contents  |  Search Technical Documentation  |  References

NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for the Number Sense, Properties, and Operations Scale, by Block and Item, Grade 4 Mathematics National Main Assessment (Accommodations Permitted [R3]): 2000

NAEP Technical DocumentationIRT parameters for the number sense, properties, and operations scale, by block and item, grade 4 mathematics national main assessment (accommodations permitted [R3]): 2000

Block	Item	NAEP ID	aj	bj	cj	dj1	dj2	dj3	dj4
M3	1	M039001	0.85	-1.62	0.16	†	†	†	†
	3	M039201	0.75	-0.43	0.00	†	†	†	†
	10	M039901	0.89	1.60	0.14	†	†	†	†
	13	M040201	0.92	1.49	0.00	†	†	†	†
M4	1	M017401	0.32	-3.73	0.18	†	†	†	†
	4	M017701	0.94	0.42	0.12	†	†	†	†
	6	M017901	1.38	0.55	0.12	†	†	†	†
	9	M018201	1.01	1.15	0.14	†	†	†	†
	11	M018401	1.54	0.70	0.22	†	†	†	†
	12	M018501	1.51	2.54	0.24	†	†	†	†
	13	M018601	0.89	2.10	0.16	†	†	†	†
M5	2	M066101	0.70	-1.06	0.16	†	†	†	†
	5	M066401	0.58	1.26	0.14	†	†	†	†
	8	M066701	0.59	-0.29	0.00	-0.31	0.31	†	†
	9	M066801	0.45	-0.04	0.00	-2.49	2.49	†	†
M6	4	M020001	1.11	-0.31	0.00	†	†	†	†
	5	M020101	1.05	1.12	0.00	†	†	†	†
	9	M020501	0.72	0.92	0.00	†	†	†	†
	10	N277903	0.48	-1.83	0.00	†	†	†	†
M7	3	M067801	1.29	0.91	0.15	†	†	†	†
	5	M068001	0.73	0.58	0.00	†	†	†	†
	6	M068002	0.66	0.47	0.00	-0.17	0.17	†	†
M8	2	M010131	0.37	-2.72	0.19	†	†	†	†
	3	M010231	0.54	-0.98	0.15	†	†	†	†
	5	M010431	0.68	0.09	0.18	†	†	†	†
	6	M010531	0.52	1.65	0.16	†	†	†	†
	7	M010631	0.27	-2.13	0.00	†	†	†	†
	9	M010831	1.02	0.11	0.18	†	†	†	†
	12	N202831	0.75	-0.80	0.19	†	†	†	†
	13	M011131	0.77	-0.10	0.18	†	†	†	†
	14	N240031	1.51	0.27	0.13	†	†	†	†
M9	2	M090601	0.69	-0.59	0.22	†	†	†	†
	3	M090701	0.74	-0.83	0.16	†	†	†	†
	4	M090801	0.67	-0.29	0.13	†	†	†	†
M11	1	M046001	0.56	-1.26	0.00	†	†	†	†
	4	M046301	1.30	0.62	0.25	†	†	†	†
	6	M046501	0.62	1.28	0.26	†	†	†	†
	9	M046801	1.08	0.49	0.00	†	†	†	†
	10	M046901	0.89	0.26	0.00	†	†	†	†
	16	M047501	0.47	-1.01	0.15	†	†	†	†
M12	3	M086601	0.52	-0.79	0.00	-0.61	0.61	†	†
	4	M086701	1.12	-0.53	0.13	†	†	†	†
	7	M087001	0.58	0.31	0.00	-0.08	0.08	†	†
	8	M087101	1.43	1.29	0.26	†	†	†	†
	10	M087301	0.57	1.57	0.00	0.18	-1.37	0.52	0.67
M13	1	M042601	0.75	-0.75	0.15	†	†	†	†
	4	M042901	0.57	0.75	0.23	†	†	†	†
	5	M043001	0.67	-1.03	0.22	†	†	†	†
	8	M043301	0.67	0.76	0.00	†	†	†	†
M14	1	M071901	0.62	-0.21	0.16	†	†	†	†
	2	M072001	0.59	-0.39	0.15	†	†	†	†
	7	M072401	0.74	0.37	0.00	0.25	-0.25	†	†
	8	M072501	0.73	1.38	0.00	-0.03	0.03	†	†
	9	M072601	0.48	1.55	0.00	-1.21	1.21	†	†
M15	5	M074601	0.75	0.64	0.28	†	†	†	†
	6	M074701	0.89	-0.55	0.00	†	†	†	†
	9	M075001	0.69	1.23	0.00	-1.11	1.11	†	†
	10	M075101	0.53	0.45	0.00	2.03	-0.43	-1.12	-0.49
† Not applicable; the number of item parameters estimated depends upon the IRT model used for scaling. NOTE: For item j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and dji is the category threshold parameter for category i. The c-parameter value is exactly zero for items scaled with the two-parameter logistic model or the generalized partial credit model. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Mathematics Assessment.

Printer-friendly Version