NAEP tdw - IRT Parameters for Items in the Data Analysis, Statistics, and Probability Subscale, Grade 12 Mathematics Combined National and State Assessment, By Item and Block: 2013

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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Assessment IRT Parameters → Mathematics Assessment IRT Parameters → IRT Parameters for Items in the Data Analysis, Statistics, and Probability Subscale, Grade 12 Mathematics Combined National and State Assessment, By Item and Block: 2013

NAEP Technical DocumentationIRT parameters for items in the data analysis, statistics, and probability subscale, grade 12 mathematics combined national and state assessment, by item and block: 2013
Block	Item	NAEP ID	a_j	b_j	c_j	d_j1	d_j2	d_j3	d_j4
† Not applicable; c parameters are not estimated for the two-parameter logistic model or generalized partial credit models, and d parameters are not estimated for two-parameter or three-parameter logistic 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 represents the category threshold parameter for category i. The c parameter value is assumed to be exactly zero and is not estimated 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), 2013 Mathematics Assessment.
MA	2	M188701	0.94	-0.22	.25	†	†	†	†
	4	M182401	2.41	1.26	.18	†	†	†	†
	12	M1867CL	0.35	-0.41	†	-0.12	1.40	-0.74	-0.55
	14	M175901	0.74	3.25	†	0.81	-0.81	†	†
MB	2	M305601	0.92	-0.31	.22	†	†	†	†
	4	M306701	0.44	0.67	†	0.14	-0.14	†	†
	8	M304901	1.02	0.03	.18	†	†	†	†
	12	M301701	1.12	1.04	.14	†	†	†	†
MC	3	M197201	0.55	-0.45	.18	†	†	†	†
MC	13	M195401	0.13	-0.07	.21	†	†	†	†
MD	2	M1842CL	0.80	-1.39	†	1.16	-1.16	†	†
	3	M1843CL	0.84	1.32	†	0.09	-0.09	†	†
	4	M184207	0.64	1.69	†	-0.43	0.43	†	†
	9	M179101	0.75	0.11	.18	†	†	†	†
ME	1	M183001	1.09	-0.55	.23	†	†	†	†
	5	M183201	0.99	0.62	.20	†	†	†	†
	10	M188101	1.15	0.12	.26	†	†	†	†
MF	2	M198101	1.01	0.13	.18	†	†	†	†
	8	M175601	0.57	-0.36	†	-1.15	1.15	†	†
	11	M177201	1.04	0.24	.20	†	†	†	†
	12	M177202	0.93	1.13	†	†	†	†	†
MG	1	M309201	1.40	-0.33	.22	†	†	†	†
	6	M307901	0.71	-0.76	.19	†	†	†	†
	10	M308201	1.25	1.12	.14	†	†	†	†
	13	M310001	0.52	0.19	†	0.48	-0.56	0.08	†
MH	5	M189301	1.61	0.25	.29	†	†	†	†
	8	M189501	0.61	0.76	.20	†	†	†	†
	10	M187101	1.31	0.44	.26	†	†	†	†
	12	M178601	1.33	0.27	.09	†	†	†	†
MI	3	M198701	0.75	0.19	†	†	†	†	†
	4	M177601	0.50	1.13	.18	†	†	†	†
	7	M181901	1.10	0.30	.17	†	†	†	†
	11	M193601	1.44	-0.42	.10	†	†	†	†
MJ	2	M189601	0.99	-0.13	.22	†	†	†	†
	4	M194201	0.77	-0.24	.16	†	†	†	†
	5	M178401	1.14	-0.14	.13	†	†	†	†
MK	5	M181201	0.67	-0.73	†	†	†	†	†
	6	M181202	1.21	0.70	†	1.68	-1.68	†	†
	7	M181203	0.49	3.35	†	†	†	†	†
ML	4	M175301	0.85	-0.13	.16	†	†	†	†
ML	5	M199901	0.90	0.40	.21	†	†	†	†
MM	3	M302701	0.40	0.22	†	-6.32	6.32	†	†
	5	M304101	0.91	-0.19	.20	†	†	†	†
	11	M304701	0.87	1.58	.16	†	†	†	†
MN	6	M310201	1.21	1.60	.04	†	†	†	†
	8	M310501	0.58	0.59	†	-4.04	4.04	†	†
	11	M310901	0.80	2.08	.23	†	†	†	†
	12	M3111CL	0.84	1.92	†	0.39	1.24	-3.10	1.46

Last updated 21 May 2017 (DC)

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