NAEP Analysis and Scaling - IRT Parameters for the Reading for Literary Experience Scale, by Block and Item, Grade 8 Reading Combined National and State Main Assessment: 2002

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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: 2002

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: 2002
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. 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 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, 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), 2002 Reading Assessment.
R3	1	R017101	1.28	-0.29	0.00	†	†	†
	2	R017102	0.53	1.22	†	0.07	-0.07	†
	3	R017103	0.61	0.08	0.13	†	†	†
	4	R017104	1.15	0.69	†	0.32	-0.32	†
	5	R017105	0.75	0.82	†	0.82	0.48	-1.29
	6	R017106	0.48	1.86	0.15	†	†	†
	7	R017107	0.45	0.73	†	0.47	-0.47	†
	8	R017108	1.10	1.21	0.00	†	†	†
	9	R017109	0.75	-0.88	0.23	†	†	†
	10	R017110	1.18	-0.03	0.00	†	†	†
R4	1	R018401	0.28	-1.61	†	0.19	-0.19	†
	2	R018501	0.59	-1.59	0.12	†	†	†
	3	R018601	0.49	-0.65	†	1.33	-1.33	†
	4	R018701	0.68	0.97	0.00	†	†	†
	5	R018801	0.42	0.48	†	-0.19	0.19	†
	6	R018901	1.03	0.52	0.27	†	†	†
	7	R019001	0.57	0.00	†	2.20	0.36	-2.56
	8	R019101	0.64	-0.44	†	1.17	-1.17	†
	9	R019201	0.33	-0.48	†	†	†	†
R5	1	R012601	0.97	-0.31	0.00	†	†	†
	2	R012602	0.89	0.25	0.15	†	†	†
	3	R012603	1.23	-1.04	0.20	†	†	†
	4	R012604	0.77	-0.14	0.00	†	†	†
	5	R012605	0.63	-0.27	0.18	†	†	†
	6	R012606	1.63	-0.77	0.32	†	†	†
	7	R012607	0.68	-0.30	†	0.19	-0.19	†
	8	R012608	0.62	-1.62	0.25	†	†	†
	9	R012609	1.30	-0.23	0.29	†	†	†
	10	R012610	1.44	-0.62	0.37	†	†	†
	11	R012611	0.72	-0.98	0.00	†	†	†

Last updated 16 February 2009 (GF)

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