Table of Contents  |  Search Technical Documentation  |  References

NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → U.S. History Assessment IRT Parameters → IRT Parameters for the Change and Continuity in American Democracy: Ideas, Institutions, Practices, and Controversies Scale, by Block and Item, Grade 12 U.S. History National Main Assessment (Accommodations Permitted [R3]): 2001

NAEP Technical DocumentationIRT parameters for the change and continuity in American democracy: Ideas, institutions, practices, and controversies scale, by block and item, grade 12 U.S. history national main assessment (accommodations permitted [R3]): 2001

Block	Item	NAEP ID	aj	bj	cj	dj1	dj2	dj3	dj4	dj5
H3	4	H044401	0.90	-0.68	0.18	†	†	†	†	†
	5	H044501	0.56	0.82	0.00	-1.13	1.91	-0.77	†	†
	10	H044901	0.92	0.88	0.33	†	†	†	†	†
H4	3	H045701	0.75	0.59	0.16	†	†	†	†	†
	5	H045901	0.91	0.49	0.00	0.78	-0.78	†	†	†
	6	H046001	0.60	1.12	0.00	†	†	†	†	†
	12	H046501	1.85	1.23	0.19	†	†	†	†	†
	17	H046901	1.30	0.88	0.19	†	†	†	†	†
	18	H046902	1.26	0.96	0.28	†	†	†	†	†
H5	5	H062401	1.41	1.30	0.21	†	†	†	†	†
	6	H062501	0.63	0.92	0.25	†	†	†	†	†
	7	H062601	0.58	-0.18	0.22	†	†	†	†	†
	9	H062801	1.07	1.42	0.10	†	†	†	†	†
	10	H062901	0.70	-0.15	0.20	†	†	†	†	†
	11	H063001	1.13	1.45	0.23	†	†	†	†	†
H6	1	H048601	0.47	-0.70	0.21	†	†	†	†	†
	2	H048701	0.66	0.54	0.22	†	†	†	†	†
	3	H048801	0.98	1.43	0.19	†	†	†	†	†
	4	H048901	0.52	1.36	0.00	-1.73	1.73	†	†	†
	6	H049101	0.83	0.69	0.21	†	†	†	†	†
	7	H049102	0.55	-1.39	0.18	†	†	†	†	†
	10	H049401	0.63	2.48	0.00	0.14	-0.10	-0.05	†	†
H7	2	H050101	0.68	0.95	0.00	0.12	-0.33	0.21	†	†
	7	H050401	1.01	1.07	0.15	†	†	†	†	†
	8	H050501	0.80	0.98	0.14	†	†	†	†	†
H8	2	H051401	0.43	2.19	0.25	†	†	†	†	†
	3	H051501	1.79	0.91	0.26	†	†	†	†	†
	4	H051601	1.04	1.13	0.10	†	†	†	†	†
	8	H052001	0.84	-0.64	0.18	†	†	†	†	†
	13	H052401	1.89	1.59	0.23	†	†	†	†	†
H9	3	H060601	0.62	0.03	0.15	†	†	†	†	†
	4	H060701	0.91	0.94	0.00	0.13	-0.13	†	†	†
	11	H061401	0.74	-1.32	0.19	†	†	†	†	†
	12	H061501	0.67	-0.14	0.00	0.31	-0.31	†	†	†
	16	H061901	0.58	-0.37	0.19	†	†	†	†	†
H10	2	H042001	0.60	0.81	0.16	†	†	†	†	†
	8	H042501	1.22	0.33	0.11	†	†	†	†	†
	9	H042601	0.79	-0.95	0.21	†	†	†	†	†
	10	H042602	1.11	1.61	0.09	†	†	†	†	†
	13	H042801	1.03	0.64	0.00	†	†	†	†	†
H11	12	H064901	0.67	0.37	0.00	0.47	-0.47	†	†	†
† Not applicable; the number of item parameters estimated depends upon the IRT model used for scaling. 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 is the category threshold parameter for category i. The c-parameter value is exactly zero for items scaled with the two-parameter logistic model or the generalized partial credit model. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2001 U.S. History Assessment.

Printer-friendly Version