NAEP Analysis and Scaling - IRT Parameters for the Reading to Perform a Task Scale, by Block and Item, Grade 12 Reading National Main Assessment: 2002

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 to Perform a Task Scale, by Block and Item, Grade 12 Reading National Main Assessment: 2002

NAEP Technical DocumentationIRT parameters for items in the reading to perform a task scale, by block and item, grade 12 reading national main assessment: 2002
Block	Item	NAEP ID	a_j	b_j	c_j	d_j1	d_j2
† 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.
R9	1	R016101	0.42	-0.91	†	-0.04	0.04
	2	R016102	0.84	-2.10	0.18	†	†
	3	R016103	1.21	-0.72	0.28	†	†
	4	R016104	0.74	-2.12	0.00	†	†
	5	R016105	1.15	-1.76	0.18	†	†
	6	R016106	0.99	-0.28	0.15	†	†
	7	R016107	0.69	-0.97	†	-0.20	0.20
	8	R016108	0.34	-0.85	†	-1.02	1.02
	9	R016109	0.47	0.24	†	1.90	-1.90
R10	1	R013401	1.03	-0.30	0.15	†	†
	2	R013402	0.63	-0.60	†	†	†
	3	R013403	0.47	-0.21	†	-1.97	1.97
	4	R013404	0.73	-1.25	0.21	†	†
	5	R013405	0.93	-1.15	0.00	†	†
	6	R013406	0.62	0.17	0.00	†	†
	7	R013407	0.60	-1.01	0.00	†	†
	8	R013408	0.53	-0.58	0.15	†	†
	9	R013409	0.68	-1.09	0.00	†	†
	10	R013410	0.79	-1.50	0.21	†	†
	11	R013411	0.58	-1.72	0.00	†	†
	12	R013412	0.45	-2.20	0.00	†	†
R11	1	R019301	0.41	0.80	†	0.03	-0.03
	2	R019401	1.19	0.22	†	0.65	-0.65
	3	R019501	0.59	-0.03	0.00	†	†
	4	R019601	1.29	0.32	0.16	†	†
	5	R019701	1.03	0.33	0.00	†	†
	6	R019801	0.60	-0.11	0.25	†	†
	7	R019901	1.38	-0.02	0.09	†	†
	8	R020001	0.49	-0.55	†	0.73	-0.73
	9	R020101	0.71	-1.00	0.23	†	†
	10	R020201	1.21	-0.45	0.00	†	†

Last updated 16 February 2009 (GF)

Printer-friendly Version