NAEP Analysis and Scaling - IRT Parameters for Items in the Number Sense, Properties, and Operations Scale, Grade 4 Mathematics Combined National and State Main Assessment, by Item and Block: 2007

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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for Items in the Number Sense, Properties, and Operations Scale, Grade 4 Mathematics Combined National and State Main Assessment, by Item and Block: 2007

NAEP Technical DocumentationIRT parameters for items in the number sense, properties, and operations scale, grade 4 mathematics combined national and state main assessment, by item and block: 2007
Block	Item	NAEP ID	a_j	b_j	c_j	d_j1	d_j2	d_j3	d_j4
† Not applicable; c parameters are not estimated for generalized partial credit models, and d parameters are not estimated for two-parameter or three-parameter logistic models. NOTE: For item j, a_j represents the discriminatory power of the item, b_j represents a location parameter related to item difficulty, c_j represents the guessing parameter, and d_ji represents the category threshold parameter for category i. The c parameter value is exactly zero for items scaled with the two-parameter logistic model. For item j, d_ji may not sum to zero because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2007 Mathematics Assessment.
M3	1	M145201	0.99	-0.27	0.28	†	†	†	†
	3	M145401	0.81	-0.33	0.17	†	†	†	†
	7	M145801	0.97	0.06	0.18	†	†	†	†
	9	M146001	0.56	1.74	0.31	†	†	†	†
	12	M146301	0.62	0.65	†	-1.82	1.82	†	†
M4	6	M147201	0.51	-1.17	0.39	†	†	†	†
	8	M147401	0.69	-1.00	0.10	†	†	†	†
	9	M147501	1.02	-0.52	0.23	†	†	†	†
	11	M147701	1.53	1.02	0.18	†	†	†	†
	13	M147901	1.32	0.70	0.16	†	†	†	†
	14	M148001	2.15	1.65	0.17	†	†	†	†
	15	M148101	0.49	1.90	†	-0.15	0.15	†	†
M5	6	M085401	0.71	0.72	†	0.47	-0.66	0.18	†
	8	M020001	0.96	-0.61	†	†	†	†	†
	9	M046301	1.09	0.51	0.22	†	†	†	†
	11	M046501	1.12	1.09	0.41	†	†	†	†
	14	M066301	0.40	-0.42	†	-2.16	2.16	†	†
	15	M067901	0.68	0.20	†	-1.21	1.21	†	†
M6	3	M135801	0.91	-0.18	0.48	†	†	†	†
	5	M136001	0.72	-0.70	0.30	†	†	†	†
	6	M136101	1.23	0.99	0.18	†	†	†	†
	7	M136201	0.71	-0.71	0.16	†	†	†	†
	9	M136401	1.14	0.07	0.15	†	†	†	†
	12	M136701	0.77	1.27	0.17	†	†	†	†
M7	2	M138901	0.71	-1.04	0.02	†	†	†	†
	6	M139301	0.53	-1.41	†	†	†	†	†
	9	M139601	0.19	0.99	†	-4.88	4.88	†	†
	11	M139801	0.40	0.87	†	-0.13	0.13	†	†
	14	M140101	1.47	1.71	0.15	†	†	†	†
	15	M140201	1.33	1.49	0.19	†	†	†	†
	16	M140301	0.71	1.27	†	-0.19	0.62	-0.67	0.23
M8	1	M010131	0.35	-2.59	0.22	†	†	†	†
	4	M086701	1.16	-0.62	0.18	†	†	†	†
	5	M010631	0.19	-1.76	†	†	†	†	†
	7	M010831	0.80	0.50	0.22	†	†	†	†
	8	M010331	0.95	-0.18	0.33	†	†	†	†
	11	M087001	0.60	-0.03	†	0.04	-0.04	†	†
	17	M072401	0.64	0.41	†	0.18	-0.18	†	†
	19	M087301	0.64	1.38	†	0.42	-1.50	0.26	0.83
M9	2	M042601	0.84	-1.13	0.18	†	†	†	†
	4	M071901	0.79	-0.84	0.27	†	†	†	†
	6	M086601	0.53	-1.15	†	-0.57	0.57	†	†
	8	M090801	0.59	-0.17	0.11	†	†	†	†
	9	M066701	0.58	-0.62	†	-0.42	0.42	†	†
	11	M066801	0.48	-0.30	†	-2.62	2.62	†	†
	16	M043301	0.72	0.64	†	†	†	†	†
	18	M0402CL	0.97	1.14	†	†	†	†	†
M10	1	M137201	0.76	-0.57	0.13	†	†	†	†
	7	M137801	1.07	0.55	0.15	†	†	†	†
	11	M138201	0.69	0.44	†	†	†	†	†
	12	M138301	0.75	0.24	0.20	†	†	†	†
	15	M138601	1.65	1.03	0.05	†	†	†	†
M11	2	M095801	0.82	-1.71	0.06	†	†	†	†
	5	M096101	1.38	0.24	0.30	†	†	†	†
	7	M096401	1.18	-0.24	0.18	†	†	†	†
	9	M096701	1.07	-0.06	0.38	†	†	†	†
	11	M096901	1.29	1.25	0.23	†	†	†	†
	13	M097101	1.18	1.34	0.27	†	†	†	†
	15	M097301	1.24	0.09	0.18	†	†	†	†
	17	M097501	0.85	-1.22	0.19	†	†	†	†
M12	6	M148701	0.81	0.53	0.16	†	†	†	†
	10	M149101	0.74	0.75	0.10	†	†	†	†
	11	M149201	0.52	1.25	†	-1.35	1.35	†	†
	12	M149301	0.74	0.94	†	†	†	†	†
	13	M149401	0.63	0.63	0.14	†	†	†	†

Last updated 08 January 2010 (JL)

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