Table of Contents  |  Search Technical Documentation  |  References

NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Reading Assessment IRT Parameters → IRT Parameters for Items in the Reading to Gain Information Scale, Grade 8 Reading Combined National and State Main Assessment, by Item and Block: 2007

NAEP Technical DocumentationIRT parameters for items in the reading to gain information scale, grade 8 reading combined national and state main assessment, by item and block: 2007

Block	Item	NAEP ID	aj	bj	cj	dj1	dj2	dj3
† 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, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and dji 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, dji 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.
R6	1	R013201	0.68	0.81	†	1.11	-0.09	-1.02
	2	R013202	0.65	-0.63	0.22	†	†	†
	3	R013203	1.05	-1.99	†	†	†	†
	4	R013204	0.95	-0.36	0.28	†	†	†
	5	R013205	0.99	-1.52	†	†	†	†
	6	R013206	0.78	-0.02	0.20	†	†	†
	7	R013207	0.59	-0.84	†	†	†	†
	8	R013208	1.69	-0.29	0.23	†	†	†
	9	R013209	0.69	1.22	†	†	†	†
	10	R013210	0.94	2.34	0.35	†	†	†
	11	R013211	0.43	0.37	†	†	†	†
	12	R013212	0.50	1.53	†	1.78	-0.66	-1.11
R7	1	R034501	0.93	-0.51	0.36	†	†	†
	2	R034601	0.24	-1.91	†	-1.25	1.25	†
	3	R034701	0.25	-1.36	0.29	†	†	†
	4	R034801	1.21	-1.66	0.41	†	†	†
	5	R034901	0.60	-0.62	†	0.90	-0.90	†
	6	R035001	0.54	-1.28	†	0.81	-0.81	†
	7	R035101	0.90	-0.27	0.24	†	†	†
	8	R035201	0.53	-0.78	†	-1.30	1.30	†
	9	R035301	0.44	-0.34	†	1.26	0.11	-1.37
	10	R035401	1.00	-1.47	0.47	†	†	†
R8	1	R053401	0.45	-0.03	†	0.68	-0.68	†
	2	R053402	0.79	-1.86	†	†	†	†
	3	R053403	1.46	-0.88	0.30	†	†	†
	4	R053404	0.82	0.35	0.17	†	†	†
	5	R053405	0.45	-0.62	†	2.02	-1.72	-0.30
	6	R053406	1.24	-0.92	0.20	†	†	†
	7	R053407	0.93	-1.56	0.25	†	†	†
	8	R053408	0.36	-1.78	†	†	†	†
	9	R053409	0.61	-0.62	0.23	†	†	†
	10	R053410	0.38	-1.39	†	†	†	†
	11	R053411	1.15	-0.13	0.34	†	†	†
R13	1	R016201	0.33	-2.45	†	†	†	†
	2	R016202	0.57	0.11	†	2.07	-2.07	†
	3	R016203	0.56	-0.90	0.34	†	†	†
	4	R016204	0.50	-0.81	†	2.83	0.94	-3.77
	5	R016205	0.62	0.58	†	1.49	-1.49	†
	6	R016206	0.95	-0.98	0.34	†	†	†
	7	R016207	0.52	0.23	†	0.31	-0.31	†
	8	R016208	1.05	-0.97	0.37	†	†	†
	9	R016209	1.19	-0.70	0.20	†	†	†
	10	R016210	0.52	0.62	†	1.59	0.51	-2.10
	11	R016211	0.41	-1.97	†	2.19	-2.19	†
	12	R016212	0.34	0.00	†	0.30	-0.30	†
	13	R016213	0.44	-0.90	†	†	†	†
R14	1	R027301	1.07	-1.19	0.60	†	†	†
	2	R026401	1.01	-1.02	0.35	†	†	†
	3	R026501	0.54	0.06	†	†	†	†
	4	R027101	1.30	-0.88	0.28	†	†	†
	5	R026601	1.61	-1.07	0.43	†	†	†
	6	R028201	1.04	0.18	0.24	†	†	†
	7	R026801	0.40	0.04	†	-0.04	1.43	-1.39
	8	R027201	0.53	-0.67	†	0.93	-0.93	†
	9	R026901	1.53	-0.25	0.29	†	†	†
	10	R027001	0.63	-1.31	†	†	†	†

Printer-friendly Version