NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Scale Composition by Item Type for New and Trend Blocks → Reading Vocabulary Assessment Subscale Composition for New and Previously Administered Blocks at Grade 8

NAEP Technical DocumentationReading Vocabulary Assessment Subscale Composition for New and Previously Administered Blocks at Grade 8

Each reading assessment includes blocks of new items and blocks of items from previous assessments. For the new items and for the previously administered items in each reading vocabulary scale, the number of multiple-choice, dichotomously scored constructed-response, and polytomously scored constructed-response items are provided at grade 8. The item counts are available for each scale as defined in the final Item Response Theory (IRT) scales.

Scale composition for new blocks as defined after scaling, grade 8 reading vocabulary combined national and state assessments, by item type and scale: 2011

Scale	Multiple-choice items		Dichotomously scored constructed-response items		Polytomously scored constructed-response items
	Scaled	Dropped	Scaled	Dropped	Polytomous uncollapsed	Dichotomous collapsed	Polytomous collapsed	Dropped
1 Single overall scale. NOTE: The item counts include Meaning Vocabulary items from both the half-blocks as well as the Meaning Vocabulary items embedded within the 25-minute Reading comprehension blocks. "Dropped" denotes items that were deleted from the final scaling. "Collapsed" denotes items that had categories that were combined and recoded for scaling. Some items were administered previously under different contexts. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Reading Vocabulary Assessment.
Total	8	0	0	0	0	0	0	0
One Scale1	8	0	0	0	0	0	0	0

Scale composition for previously administered blocks as defined after scaling, grade 8 reading vocabulary combined national and state assessments, by item type and scale: 2011

Scale	Multiple-choice items			Dichotomously scored constructed-response items			Polytomously scored constructed-response items
	Concurrent	Split	Dropped	Concurrent	Split	Dropped	Polytomous uncollapsed	Dichotomous collapsed	Polytomous collapsed	Split	Dropped
1 Single overall scale. NOTE: The item counts include Meaning Vocabulary items from both the half-blocks as well as the Meaning Vocabulary items embedded within the 25-minute Reading comprehension blocks. "Concurrent" denotes items that were scaled as the same items across assessment years. "Split" denotes items that were scaled as different items in each assessment year. "Dropped" denotes items that were deleted from the final scaling. "Collapsed" denotes items that had categories that were combined and recoded for scaling. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Reading Vocabulary Assessment.
Total	47	1	0	0	0	0	0	0	0	0	0
One Scale1	47	1	0	0	0	0	0	0	0	0	0

Block composition, grade 8 reading vocabulary combined national and state assessments, by item type and block: 2011

Block	Total number of items	Number of multiple-choice items	Number of constructed-response items
			2-category	3-category	4-category	5-category
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Reading Vocabulary Assessment.
Total	56	56	0	0	0	0
R14	6	6	0	0	0	0
R15	5	5	0	0	0	0
R16	5	5	0	0	0	0
R17	5	5	0	0	0	0
R18	6	6	0	0	0	0
R19	5	5	0	0	0	0
Embedded	24	24	0	0	0	0

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