NAEP tdw - IRT Parameters for Items in the Grade 8 Meaning Vocabulary 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 → Reading Assessment IRT Parameters → IRT Parameters for Items in the Grade 8 Meaning Vocabulary Combined National and State Assessment, By Item and Block: 2013

NAEP Technical DocumentationIRT parameters for items in the grade 8 meaning vocabulary combined national and state assessment, by item and block: 2013
Block	Item¹	NAEP ID	a_j	b_j	c_j
¹¹ The table includes meaning vocabulary items from the half-blocks and the meaning vocabulary items embedded within the 25-minute reading comprehension blocks. NOTE: For item j, aj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, and cj represents the guessing parameter. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2013 Reading Assessment.
R1	2	R059602	0.54	-0.64	.14
R1	8	R059608	0.73	-0.55	.18
R2	8	R069808	0.76	-1.40	.13
R2	9	R069809	0.93	-1.10	.12
R3	2	R060102	0.84	-0.17	.32
R3	9	R060109	0.80	0.83	.19
R4	2	R060302	0.81	-0.72	.17
R4	8	R060308	0.66	0.57	.19
R5	2	R058502	1.14	-0.84	.20
R5	3	R058503	0.71	-1.37	.11
R6	5	R058605	0.77	-1.10	.09
R6	10	R058610	1.17	-1.37	.16
R7	2	R058802	1.51	-1.66	.21
R7	8	R058808	1.07	-0.77	.23
R8	2	R059102	1.04	-1.84	.08
R8	4	R059104	1.46	-1.88	.10
R9	9	R060510	0.69	-1.80	.16
R9	10	R060511	0.85	-1.41	.10
R11	9	R069610	1.20	-0.90	.27
R11	10	R069611	0.98	-0.66	.12
R12	8	R061008	0.98	-0.25	.17
R12	9	R061009	1.30	-1.14	.14
R13	3	R069703	0.50	-0.49	.16
R13	4	R069704	1.15	-1.93	.17
R14	1	R0V0401	1.22	1.10	.21
	2	R0V0402	1.14	-1.16	.13
	3	R0V0403	0.80	0.17	.17
	4	R0V0404	0.42	0.19	.16
	5	R0V0405	0.58	0.41	.11
	6	R0V0406	0.75	0.89	.24
R15	1	R0V0506	0.99	-0.36	.10
	2	R0V0507	0.54	0.51	.11
	3	R0V0508	0.95	-0.90	.14
	4	R0V0509	0.39	-0.78	.12
	5	R0V0510	1.86	0.97	.21
R16	1	R0V0206	1.20	-1.65	.14
	2	R0V0207	2.05	-1.50	.14
	3	R0V0208	1.93	-1.52	.14
	4	R0V0209	1.27	-1.39	.10
	5	R0V0210	2.01	-1.38	.12
R17	1	R0V0306	1.42	-1.22	.20
	2	R0V0307	1.45	-1.30	.11
	3	R0V0308	0.41	-0.25	.19
	4	R0V0309	1.48	-1.08	.19
	5	R0V0310	1.07	-0.69	.12
R18	1	R0V1701	1.28	-1.73	.16
	2	R0V1702	1.03	0.28	.11
	3	R0V1703	1.31	-0.93	.13
	4	R0V1704	0.77	-0.29	.19
	5	R0V1705	0.96	-1.39	.14
	6	R0V1706	0.52	-0.99	.14
R19	1	R0V0708	0.82	-0.94	.16
	2	R0V0709	0.75	-1.66	.17
	3	R0V0710	0.83	0.05	.16
	4	R0V0711	0.95	-0.25	.17
	5	R0V0713	1.42	-1.98	.15

Last updated 21 May 2017 (DC)

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