NAEP Analysis and Scaling - IRT Parameters for Items in the Reading for Literary Experience Scale, Grade 8 Reading Combined National and State Main Assessment, by Item and Block: 2009

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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → IRT Parameters for the Reading Assessments → IRT Parameters for Items in the Reading for Literary Experience Scale, Grade 8 Reading Combined National and State Main Assessment, by Item and Block: 2009

NAEP Technical DocumentationIRT parameters for items in the reading for literary experience scale, grade 8 reading combined national and state main assessment, by item and block: 2009
Block	Item	NAEP ID	a_j	b_j	c_j	d_j1	d_j2	d_j3
† 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), 2009 Reading Assessment.
F3	1	R017101	1.11	-0.29	†	†	†	†
	2	R017102	0.62	0.63	†	†	†	†
	3	R017103	0.55	0.15	0.10	†	†	†
	4	R017104	1.19	0.65	†	0.28	-0.28	†
	5	R017105	0.77	0.80	†	0.75	0.59	-1.34
	6	R017106	0.85	1.97	0.25	†	†	†
	7	R017107	0.48	0.77	†	0.36	-0.36	†
	8	R017108	1.38	1.22	†	†	†	†
	9	R017109	0.75	-0.69	0.25	†	†	†
	10	R017110	1.32	0.07	†	†	†	†
F4	1	R055501	0.53	-1.55	†	0.92	-0.92	†
	2	R055601	1.17	0.05	0.40	†	†	†
	3	R055701	1.10	-0.28	0.40	†	†	†
	4	R055801	0.49	0.51	†	2.20	-2.20	†
	5	R055901	0.73	-1.17	0.19	†	†	†
	6	R056001	0.85	-0.26	0.25	†	†	†
	7	R056101	0.56	-0.01	†	1.22	-0.54	-0.67
	8	R056201	0.92	-1.29	0.19	†	†	†
	9	R056301	0.32	1.95	†	-0.09	0.09	†
F5	1	R012601	0.96	-0.26	†	†	†	†
	2	R012602	1.13	0.24	0.14	†	†	†
	3	R012603	1.19	-0.98	0.22	†	†	†
	4	R012604	0.80	0.01	†	†	†	†
	5	R012605	0.62	-0.10	0.25	†	†	†
	6	R012606	1.74	-0.66	0.37	†	†	†
	7	R012607	0.70	-0.31	†	0.46	-0.46	†
	8	R012608	0.51	-2.21	0.23	†	†	†
	9	R012609	1.48	-0.08	0.28	†	†	†
	10	R012610	1.79	-0.51	0.41	†	†	†
	11	R012612	0.51	-0.57	†	†	†	†
F9	1	R056501	0.85	-1.04	†	†	†	†
	2	R056601	1.32	-1.12	0.24	†	†	†
	3	R056701	0.67	-0.93	0.31	†	†	†
	4	R056801	0.65	-0.74	†	1.20	-1.20	†
	5	R056901	0.91	-1.11	0.10	†	†	†
	6	R057001	0.83	-1.55	0.15	†	†	†
	7	R057101	0.64	-0.53	†	1.13	-1.13	†
	8	R057201	0.85	-1.21	0.22	†	†	†
	9	R057301	0.47	0.37	†	0.52	-0.52	†
	10	R057401	1.07	-0.20	0.10	†	†	†
F12	1	R053201	0.63	-2.97	0.32	†	†	†
	2	R053202	0.65	-1.30	†	†	†	†
	3	R053203	0.41	-0.97	†	0.74	-0.74	†
	4	R053204	1.04	0.02	0.21	†	†	†
	5	R053205	0.59	-0.26	†	0.06	0.45	-0.51
	6	R053206	1.44	-0.18	0.17	†	†	†
	7	R053207	0.83	0.15	†	0.86	-0.86	†
	8	R053208	1.32	-0.82	0.24	†	†	†
	9	R053209	0.55	-0.91	†	0.50	-0.50	†
	10	R053210	0.97	0.09	0.15	†	†	†
R1	1	R059601	0.49	0.14	0.10	†	†	†
	2	R059602	0.55	-0.36	0.13	†	†	†
	3	R059603	0.86	-0.56	0.15	†	†	†
	4	R059604	0.71	-1.48	†	†	†	†
	5	R059610	0.38	-0.07	†	0.99	-1.39	0.40
	6	R059606	0.66	-0.60	†	0.52	-0.52	†
	7	R059605	0.70	0.84	†	0.96	-0.96	†
	8	R059608	0.77	0.00	0.34	†	†	†
	9	R059609	0.77	-1.39	0.30	†	†	†
	10	R059607	0.51	-0.70	†	0.26	-0.26	†
R2	1	R059801	1.11	0.79	0.14	†	†	†
	2	R059802	0.26	3.00	0.17	†	†	†
	3	R059803	0.55	0.63	†	1.38	0.05	-1.43
	4	R059804	0.78	-0.90	0.27	†	†	†
	5	R059805	1.04	-0.18	0.39	†	†	†
	6	R059806	0.55	1.17	†	-0.17	0.17	†
	7	R059807	1.21	0.82	†	1.09	-1.09	†
	8	R059808	1.25	0.57	0.30	†	†	†
	9	R059809	0.88	-0.12	†	†	†	†
	10	R059810	1.24	0.24	0.28	†	†	†
R5	1	R058501	1.23	-1.09	0.21	†	†	†
	2	R058502	1.23	-0.62	0.22	†	†	†
	3	R058503	0.69	-1.35	0.15	†	†	†
	4	R058504	0.44	-1.13	†	1.22	-1.22	†
	5	R058505	0.89	-0.14	0.20	†	†	†
	6	R058506	0.87	-0.96	0.18	†	†	†
	7	R058507	0.63	-1.23	0.12	†	†	†
	8	R058508	0.52	-0.95	†	0.44	-0.19	-0.25
	9	R058509	0.44	-0.46	†	†	†	†
	10	R058510	0.85	-1.09	0.21	†	†	†
R6	1	R058601	0.88	-1.37	0.15	†	†	†
	2	R058602	0.47	-0.60	†	1.37	-1.37	†
	3	R058603	1.06	-1.11	0.32	†	†	†
	4	R058604	1.18	-0.96	0.22	†	†	†
	5	R058605	0.67	-1.05	0.14	†	†	†
	6	R058606	0.56	-0.44	†	0.35	-0.35	†
	7	R058607	1.08	-0.83	0.28	†	†	†
	8	R058608	0.54	-0.19	†	1.36	-0.53	-0.83
	9	R058609	0.75	-0.54	0.15	†	†	†
	10	R058610	1.02	-1.25	0.25	†	†	†
R9	1	R060501	0.48	-0.80	0.21	†	†	†
	2	R060502	1.34	-1.78	0.28	†	†	†
	3	R060503	0.64	-0.36	†	0.48	-0.48	†
	4	R060504	0.97	-0.71	0.22	†	†	†
	5	R060505	0.57	-0.54	†	0.79	-0.35	-0.44
	6	R060507	0.40	-0.03	†	0.72	-0.72	†
	7	R060508	0.75	0.66	†	1.41	-1.41	†
	8	R060509	0.52	-0.61	†	0.26	-0.26	†
	9	R060510	0.83	-1.08	0.40	†	†	†
	10	R060511	0.87	-0.82	0.33	†	†	†
R10	1	R060701	1.18	-0.58	0.32	†	†	†
	2	R060702	0.81	-0.16	0.23	†	†	†
	3	R060703	0.38	-0.24	†	1.28	-1.28	†
	4	R060704	0.47	-0.03	†	0.23	-0.23	†
	5	R060705	0.97	0.31	0.38	†	†	†
	6	R060706	0.71	-0.07	†	2.07	-1.11	-0.96
	7	R060707	0.38	-1.12	†	0.07	-0.07	†
	8	R060708	0.62	0.31	†	1.56	-1.56	†
	9	R060709	1.16	0.02	0.21	†	†	†

Last updated 03 June 2016 (GF)

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