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: 2007

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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 Reading for Literary Experience Scale, Grade 8 Reading Combined National and State Main Assessment, by Item and Block: 2007

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: 2007
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), 2007 Reading Assessment.
R3	1	R017101	1.18	-0.25	†	†	†	†
	2	R017102	0.62	0.68	†	†	†	†
	3	R017103	0.56	0.06	0.10	†	†	†
	4	R017104	1.19	0.69	†	0.29	-0.29	†
	5	R017105	0.78	0.85	†	0.68	0.64	-1.32
	6	R017106	0.81	2.03	0.24	†	†	†
	7	R017107	0.49	0.87	†	0.38	-0.38	†
	8	R017108	1.44	1.23	†	†	†	†
	9	R017109	0.72	-0.89	0.18	†	†	†
	10	R017110	1.30	0.10	†	†	†	†
R4	1	R055501	0.50	-1.56	†	0.93	-0.93	†
	2	R055601	1.17	0.04	0.39	†	†	†
	3	R055701	1.03	-0.38	0.37	†	†	†
	4	R055801	0.49	0.58	†	2.17	-2.17	†
	5	R055901	0.76	-1.03	0.23	†	†	†
	6	R056001	0.91	-0.19	0.28	†	†	†
	7	R056101	0.54	0.03	†	1.24	-0.61	-0.63
	8	R056201	0.99	-1.12	0.24	†	†	†
	9	R056301	0.31	1.97	†	-0.25	0.25	†
R5	1	R012601	0.88	-0.36	†	†	†	†
	2	R012602	1.09	0.30	0.16	†	†	†
	3	R012603	1.30	-0.91	0.22	†	†	†
	4	R012604	0.79	0.02	†	†	†	†
	5	R012605	0.63	-0.06	0.25	†	†	†
	6	R012606	1.69	-0.67	0.34	†	†	†
	7	R012607	0.70	-0.29	†	0.47	-0.47	†
	8	R012608	0.52	-2.00	0.27	†	†	†
	9	R012609	1.38	-0.12	0.29	†	†	†
	10	R012610	1.42	-0.63	0.38	†	†	†
	11	R012612	0.47	-0.46	†	†	†	†
R9	1	R056501	0.89	-0.98	†	†	†	†
	2	R056601	1.36	-1.10	0.23	†	†	†
	3	R056701	0.70	-0.70	0.37	†	†	†
	4	R056801	0.65	-0.70	†	1.19	-1.19	†
	5	R056901	0.91	-1.08	0.08	†	†	†
	6	R057001	0.84	-1.52	0.15	†	†	†
	7	R057101	0.65	-0.53	†	1.08	-1.08	†
	8	R057201	0.80	-1.21	0.23	†	†	†
	9	R057301	0.45	0.34	†	0.38	-0.38	†
	10	R057401	1.11	-0.14	0.12	†	†	†
R12	1	R053201	0.65	-2.93	0.34	†	†	†
	2	R053202	0.73	-1.19	†	†	†	†
	3	R053203	0.39	-0.99	†	0.73	-0.73	†
	4	R053204	1.10	0.05	0.22	†	†	†
	5	R053205	0.62	-0.25	†	0.14	0.34	-0.48
	6	R053206	1.48	-0.07	0.18	†	†	†
	7	R053207	0.89	0.26	†	0.89	-0.89	†
	8	R053208	1.27	-0.82	0.23	†	†	†
	9	R053209	0.55	-0.86	†	0.52	-0.52	†
	10	R053210	0.92	0.09	0.15	†	†	†

Last updated 08 January 2010 (JL)

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