Table of Contents  |  Search Technical Documentation  |  References

NAEP Analysis and Scaling → Estimation of NAEP Scale Scores → NAEP Assessment IRT Parameters → Geography Assessment IRT Parameters → IRT Parameters for the Environment and Society Scale, by Block and Item, Grade 4 Geography National Main Assessment (Accommodations Permitted [R3]): 2001

NAEP Technical DocumentationIRT parameters for the environment and society scale, by block and item, grade 4 geography national main assessment (accommodations permitted [R3]): 2001

Block	Item	NAEP ID	aj	bj	cj	dj1	dj2	dj3
† 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 Geography Assessment.
G3	7	G028401	0.39	0.30	†	0.94	-0.94	†
G3	10	G028701	0.88	1.01	†	0.83	0.24	-1.07
G3	14	G029101	0.53	-0.05	0.29	†	†	†
G4	3	G008101	1.10	-0.03	0.23	†	†	†
G4	12	G008801	0.71	0.87	0.24	†	†	†
G4	13	G008901	0.78	-0.97	0.24	†	†	†
G4	15	G009001	0.48	-0.49	†	1.67	-0.67	-1.00
G5	4	G009201	0.61	0.93	†	0.64	-0.64	†
G5	12	G009801	0.65	-1.96	0.22	†	†	†
G5	13	G009901	0.40	0.21	0.24	†	†	†
G6	2	G029801	0.59	-1.51	0.23	†	†	†
G6	5	G030101	0.56	1.69	†	0.36	-0.36	†
G6	9	G030501	0.47	0.45	†	-0.11	0.76	-0.65
G7	10	G032401	0.53	0.20	†	0.16	-0.16	†
G8	5	G012302	0.65	1.85	0.17	†	†	†
G8	12	G012801	0.45	-0.77	0.22	†	†	†
G8	17	G013201	0.51	2.07	†	-0.26	0.26	†

Printer-friendly Version