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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Scale Composition by Item Type for New and Previously Administered Blocks → Reading Long-Term Trend Assessment Subscale Composition for New and Previously Administered Blocks at Age 9: 2004

NAEP Technical DocumentationReading Long-Term Trend Assessment Subscale Composition for New and Previously Administered Blocks at Age 9: 2004

Each 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 scale, the number of multiple-choice items and dichotomously scored constructed-response items are provided at age 9. 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, by item type and scale, age 9 reading long-term trend assessment: 2004

Scale	Total	Number of multiple-choice items		Number of dichotomously scored constructed-response items		Number of polytomously scored constructed-response items
		Scaled	Dropped	Scaled	Dropped	Polytomous (uncollapsed)	Dichotomous collapsed	Polytomous collapsed	Dropped
Reading long-term trend age 9	91	87	0	0	0	3	1	0	0
NOTE: "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), 2004 Reading Long-Term Trend Assessment.

Scale composition for trend blocks as defined after scaling, by item type and scale, age 9 reading long-term trend assessment: 2004

Scale	Multiple-choice items			Dichotomously scored constructed-response items
	Concurrent	Split	Dropped	Concurrent	Split	Dropped
NOTE: "Concurrent" denotes items that were scaled as common 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. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 Reading Long-Term Trend Assessment.
Total	94	2	4	3	1	1

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