NAEP tdw - IRT Parameters for Items in the Information Subscale, Grade 12 Reading Combined National and State Assessment, By Item and Block: 2013

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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Assessment IRT Parameters → IRT Parameters for Items in the Information Subscale, Grade 12 Reading Combined National and State Assessment, By Item and Block: 2013

NAEP Technical DocumentationIRT parameters for the items in the information subscale, grade 12 reading combined national and state assessment, by item and block: 2013
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 the two-parameter logistic model or 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 assumed to be exactly zero and is not estimated 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), 2013 Reading Assessment.
R3	1	R060101	0.66	-0.99	.34	†	†	†	†
	2	R060102	1.14	-0.52	.36	†	†	†	†
	3	R060103	0.64	-1.27	†	†	†	†	†
	4	R060104	0.88	-1.42	.32	†	†	†	†
	5	R060105	0.81	-0.89	†	†	†	†	†
	6	R060106	1.11	-0.88	.23	†	†	†	†
	7	R060107	1.09	0.02	.24	†	†	†	†
	8	R060108	0.56	-0.34	†	0.13	0.66	-0.80	†
	9	R060109	0.71	-0.38	.14	†	†	†	†
	10	R060110	0.55	0.28	.25	†	†	†	†
R4	1	R060301	0.56	-1.71	†	†	†	†	†
	2	R060302	0.97	-1.13	.26	†	†	†	†
	3	R060304	0.99	-0.98	.35	†	†	†	†
	4	R060305	0.71	0.48	†	2.13	-2.13	†	†
	5	R060303	1.23	-0.17	.19	†	†	†	†
	6	R060306	0.66	0.45	†	1.35	-1.35	†	†
	7	R060307	0.73	-0.47	.24	†	†	†	†
	8	R060308	0.84	-0.03	.23	†	†	†	†
	9	R060309	0.55	-0.89	†	†	†	†	†
	10	R060310	1.26	-0.36	.24	†	†	†	†
R7	1	R062201	0.77	-2.07	.24	†	†	†	†
	2	R062202	0.93	-0.53	.38	†	†	†	†
	3	R062203	0.90	-0.57	†	†	†	†	†
	4	R062204	0.68	-0.89	.40	†	†	†	†
	5	R062205	0.80	0.13	†	†	†	†	†
	6	R062206	0.77	-0.34	.13	†	†	†	†
	7	R062207	0.66	0.09	†	1.37	-1.13	-0.24	†
	8	R062208	0.40	-0.79	.19	†	†	†	†
	9	R062209	1.16	0.12	.29	†	†	†	†
	10	R062210	0.81	0.87	†	1.41	-1.41	†	†
	11	R062211	1.09	-0.77	.27	†	†	†	†
R8	1	R062301	1.12	-0.87	.23	†	†	†	†
	2	R062302	1.44	-1.06	.40	†	†	†	†
	3	R062303	0.72	1.02	†	1.28	-1.28	†	†
	4	R062304	1.03	0.39	†	0.91	-0.91	†	†
	5	R062305	1.26	-0.63	.24	†	†	†	†
	6	R062307	0.95	-0.31	.41	†	†	†	†
	7	R062308	0.48	0.49	†	-0.61	1.83	-1.22	†
	8	R062309	1.31	-0.64	.31	†	†	†	†
	9	R062310	1.45	0.05	.32	†	†	†	†
	10	R062311	0.64	-0.49	†	0.03	-0.03	†	†
R9	1	R062501	0.87	-1.09	†	0.44	-0.44	†	†
	2	R062502	1.12	-0.05	.33	†	†	†	†
	3	R062511	1.29	-0.15	.32	†	†	†	†
	4	R062505	0.62	0.29	†	1.12	-1.12	†	†
	5	R062507	1.09	0.01	.32	†	†	†	†
	6	R062508	0.55	0.20	†	1.06	0.12	-1.18	†
	7	R062509	1.08	0.91	.26	†	†	†	†
	8	R062503	0.62	0.24	†	0.41	-0.41	†	†
	9	R062510	0.73	-0.09	.27	†	†	†	†
R10	1	R062701	1.11	-0.68	.17	†	†	†	†
	2	R062702	0.78	-0.09	.21	†	†	†	†
	3	R062703	0.41	-1.14	.23	†	†	†	†
	4	R062704	1.07	0.32	.31	†	†	†	†
	5	R062705	0.77	0.24	†	0.90	-0.90	†	†
	6	R062706	0.67	0.28	†	0.82	-0.21	-0.62	†
	7	R062707	1.47	-0.29	.30	†	†	†	†
	8	R062708	0.78	-0.86	†	†	†	†	†
	9	R062709	1.06	0.82	.44	†	†	†	†
	10	R062710	0.80	0.54	†	0.47	-0.47	†	†
R11	1	R062901	1.38	-0.55	.30	†	†	†	†
	2	R062902	0.51	-0.29	†	0.99	-0.99	†	†
	3	R062903	0.55	0.51	†	0.97	-0.97	†	†
	4	R062904	0.50	-0.52	.26	†	†	†	†
	5	R062905	0.79	0.08	.23	†	†	†	†
	6	R062908	0.64	0.58	†	0.87	-0.83	-0.04	†
	7	R062906	1.17	0.97	.13	†	†	†	†
	8	R062907	0.45	-0.35	.20	†	†	†	†
	9	R062909	0.59	0.60	†	0.39	-0.39	†	†
	10	R062910	1.11	-1.13	.30	†	†	†	†
R12	1	R063102	1.43	-1.12	.52	†	†	†	†
	2	R063103	1.43	0.14	.32	†	†	†	†
	3	R063101	0.79	-0.19	†	0.53	-0.53	†	†
	4	R063104	0.89	-0.88	.23	†	†	†	†
	5	R063105	0.66	0.55	†	1.12	-0.75	-0.36	†
	6	R063106	0.91	-0.94	.21	†	†	†	†
	7	R063801	0.48	-0.40	†	0.09	-0.09	†	†
	8	R063802	1.33	-0.22	.31	†	†	†	†
	9	R063108	1.27	-0.67	.31	†	†	†	†
	10	R063109	0.69	-0.28	†	-1.84	1.84	†	†
	11	R063110	0.86	0.34	.25	†	†	†	†
R13	1	R079101	0.63	-0.55	†	0.14	-0.14	†	†
	2	R079102	1.03	-0.64	.14	†	†	†	†
	3	R079103	0.97	-1.01	.29	†	†	†	†
	4	R079104	1.55	1.14	.23	†	†	†	†
	5	R079105	1.35	-0.08	.27	†	†	†	†
	6	R079106	0.32	1.06	†	0.11	0.26	-0.36	†
	7	R079107	0.54	0.53	†	†	†	†	†
	8	R079108	1.20	0.42	.29	†	†	†	†
	9	R079109	0.97	-1.17	.32	†	†	†	†
	10	R079110	0.50	1.15	†	0.01	-0.01	†	†
	11	R079111	0.50	0.42	†	0.50	-0.50	†	†

Last updated 21 May 2017 (DC)

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