NAEP Analysis and Scaling - IRT Parameters for the Civics Scale, Grade 4 Civics National Main Assessment, by Item and Block: 2006

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NAEP Analysis and Scaling → Estimation of NAEP Scale Scores → NAEP Assessment IRT Parameters → Civics Assessment IRT Parameters → IRT Parameters for the Civics Scale, Grade 4 Civics National Main Assessment, by Item and Block: 2006

NAEP Technical DocumentationIRT parameters for the civics scale, grade 4 civics national main assessment, by item and block: 2006
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), 2006 Civics Assessment.
P3	1	P030001	1.01	-0.35	0.30	†	†	†
	2	P030002	0.60	-0.54	0.28	†	†	†
	3	P030003	1.44	0.42	0.26	†	†	†
	4	P030004	0.56	-0.26	†	0.72	-0.72	†
	5	P030005	0.43	0.29	†	0.58	-0.58	†
	6	P030006	2.29	0.59	0.24	†	†	†
	7	P030007	0.50	1.10	†	0.68	-0.68	†
	8	P030008	0.80	0.71	0.26	†	†	†
	9	P030009	0.58	1.93	0.20	†	†	†
	10	P030010	0.50	1.52	†	0.90	0.25	-1.15
	11	P030011	0.77	-1.33	0.45	†	†	†
	12	P030012	1.38	0.84	0.22	†	†	†
	13	P030013	1.02	-0.01	0.21	†	†	†
	14	P030014	1.59	1.73	0.12	†	†	†
	15	P030015	0.66	-1.10	0.23	†	†	†
P4	1	P040101	1.18	-0.31	0.16	†	†	†
	2	P040102	0.38	0.39	†	†	†	†
	3	P040103	0.75	-0.05	0.23	†	†	†
	4	P040104	1.57	0.98	0.22	†	†	†
	5	P040105	0.50	0.71	†	0.41	-0.41	†
	6	P040106	0.84	0.36	0.23	†	†	†
	7	P040107	1.23	0.90	0.29	†	†	†
	8	P040108	0.86	-0.05	0.27	†	†	†
	9	P040109	0.60	1.66	†	-0.50	0.50	†
	10	P040110	1.13	1.99	0.25	†	†	†
	11	P040111	0.51	0.20	†	-0.32	0.32	†
	12	P040112	1.14	1.19	0.16	†	†	†
	13	P040113	1.18	0.59	0.21	†	†	†
	14	P040114	1.17	-0.22	0.20	†	†	†
	15	P040115	1.20	0.94	0.28	†	†	†
P5	1	P040201	1.70	0.66	0.13	†	†	†
	2	P040202	0.53	-0.36	0.23	†	†	†
	3	P040203	0.62	1.45	†	-0.59	1.20	-0.61
	4	P040204	1.12	-0.59	0.23	†	†	†
	5	P040205	1.66	0.17	0.24	†	†	†
	6	P040206	0.45	-0.28	†	3.06	-3.06	†
	7	P040207	1.09	0.75	0.22	†	†	†
	8	P040208	0.68	2.01	0.20	†	†	†
	9	P040209	0.39	1.58	†	-0.34	0.34	†
	10	P040210	0.57	-2.59	0.29	†	†	†
	11	P040211	1.15	1.14	0.23	†	†	†
	12	P040212	0.59	2.44	0.20	†	†	†
	13	P040213	1.81	0.44	0.23	†	†	†
	14	P040214	1.45	0.71	0.25	†	†	†
	15	P040215	1.19	0.25	0.24	†	†	†
P6	1	P042120	0.64	-0.92	0.30	†	†	†
	2	P042121	1.19	-0.23	0.22	†	†	†
	3	P042122	0.72	-0.21	†	0.71	-0.71	†
	5	P042124	1.44	1.27	0.29	†	†	†
	6	P042125	0.48	-2.03	†	0.08	-0.08	†
	7	P042126	0.89	-0.57	0.30	†	†	†
	8	P042127	1.34	1.02	0.24	†	†	†
	9	P042128	0.74	0.07	0.21	†	†	†
	10	P042129	0.36	0.28	†	†	†	†
	11	P042130	0.69	0.29	0.29	†	†	†
	12	P042131	0.88	0.45	0.27	†	†	†
	13	P042132	0.63	1.30	†	0.93	-0.93	†
	14	P042133	0.95	1.12	0.25	†	†	†
	15	P042134	0.74	0.61	0.24	†	†	†
P7	1	P042135	1.01	-0.87	0.28	†	†	†
	2	P042136	0.79	0.33	†	0.19	-0.19	†
	3	P042137	0.99	-0.36	0.26	†	†	†
	4	P042138	0.84	1.13	0.35	†	†	†
	5	P042139	0.96	1.23	0.25	†	†	†
	6	P042140	0.53	0.37	†	†	0.86	-0.85
	7	P042141	1.43	1.06	0.15	†	†	†
	8	P042142	0.89	0.20	0.22	†	†	†
	9	P042143	0.61	0.47	†	0.90	0.20	-1.10
	10	P042144	0.63	0.74	0.31	†	†	†
	11	P042145	1.24	-0.43	0.29	†	†	†
	12	P042146	1.18	1.36	0.11	†	†	†
	13	P042147	0.35	0.86	†	-2.51	2.51	†
	14	P042148	1.04	0.06	0.20	†	†	†
	15	P042149	1.27	-0.42	0.22	†	†	†
P8	1	P040501	1.71	1.21	0.42	†	†	†
	2	P040502	0.57	0.38	†	0.60	0.30	-0.90
	3	P040503	1.18	-0.02	0.29	†	†	†
	4	P040504	0.71	0.84	0.21	†	†	†
	5	P040505	0.89	0.60	0.34	†	†	†
	7	P040507	0.45	2.65	†	1.53	-1.53	†
	8	P040508	0.43	2.36	0.23	†	†	†
	9	P040509	0.95	0.19	0.35	†	†	†
	10	P040510	0.31	-0.26	†	-1.27	1.27	†
	11	P040511	0.79	0.12	0.25	†	†	†
	12	P040512	0.55	0.02	0.35	†	†	†
	13	P040513	1.72	0.85	0.23	†	†	†
	14	P040514	1.05	0.80	0.25	†	†	†
	15	P040515	0.80	-0.30	0.32	†	†	†

Last updated 08 January 2010 (JL)

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