Table of Contents  |  Search Technical Documentation  |  References

NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment Item Response Theory Parameters → Reading Assessment Item Response Theory Parameters → IRT Parameters for the Reading for Literary Experience Scale, by Block and Item, Grade 8 Reading Combined National and State Main Assessment: 2003

NAEP Technical DocumentationIRT parameters for items in the reading for literary experience scale, by block and item, grade 8 reading combined national and state main assessment: 2003

Block	Item	NAEP ID	aj	bj	cj	dj1	dj2	dj3
† Not applicable; c parameters are not estimated for generalized partial credit 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 is 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), 2003 Reading Assessment.
R3	1	R017101	1.31	-0.29	0.00	†	†	†
	2	R017102	0.59	0.66	0.00	†	†	†
	3	R017103	0.56	-0.05	0.08	†	†	†
	4	R017104	1.20	0.68	†	0.31	-0.31	†
	5	R017105	0.82	0.89	†	0.84	0.53	-1.37
	6	R017106	0.61	1.97	0.21	†	†	†
	7	R017107	0.47	0.76	†	0.47	-0.47	†
	8	R017108	1.19	1.18	0.00	†	†	†
	9	R017109	0.72	-0.96	0.19	†	†	†
	10	R017110	1.22	0.00	0.00	†	†	†
R4	1	R018401	0.32	-1.20	†	0.10	-0.10	†
	2	R018501	0.62	-1.53	0.14	†	†	†
	3	R018601	0.55	-0.35	†	1.08	-1.08	†
	4	R018701	0.68	1.00	0.00	†	†	†
	5	R018801	0.41	0.53	†	-0.25	0.25	†
	6	R018901	1.15	0.54	0.28	†	†	†
	7	R019001	0.56	-0.04	†	1.64	0.26	-1.90
	8	R019101	0.65	-0.28	†	1.06	-1.06	†
	9	R019201	0.47	-1.31	0.00	†	†	†
R5	1	R012601	0.97	-0.36	0.00	†	†	†
	2	R012602	0.94	0.22	0.14	†	†	†
	3	R012603	1.20	-1.05	0.18	†	†	†
	4	R012604	0.76	-0.13	0.00	†	†	†
	5	R012605	0.65	-0.17	0.22	†	†	†
	6	R012606	1.79	-0.68	0.36	†	†	†
	7	R012607	0.78	-0.34	†	0.56	-0.56	†
	8	R012608	0.59	-1.67	0.28	†	†	†
	9	R012609	1.29	-0.28	0.26	†	†	†
	10	R012610	1.50	-0.57	0.38	†	†	†
	11	R012612	0.47	-0.05	0.00	†	†	†
R12	1	R024301	0.37	-1.21	0.14	†	†	†
	2	R024401	0.60	-2.02	†	0.93	-0.93	†
	3	R024501	0.48	-1.94	†	1.40	-1.40	†
	4	R024601	0.78	-1.51	0.22	†	†	†
	5	R025901	0.55	-1.67	0.26	†	†	†
	6	R025001	0.46	0.10	0.00	†	†	†
	7	R024801	0.56	-0.17	†	1.23	-1.23	†
	8	R026001	1.03	-0.46	0.19	†	†	†
	9	R026101	0.35	-1.51	0.00	†	†	†
	10	R025601	0.41	-0.76	†	2.01	-2.01	†

Printer-friendly Version