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HomeTDWNAEP Analysis and ScalingEstimation of NAEP Score ScalesNAEP ScalesScale Composition by Item Type for New and Previously Administered BlocksReading Long-Trend Trend Assessment Subscale Composition for New and Previously Administered Blocks at Age 13: 2004

NAEP Technical DocumentationReading Long-Trend Trend Assessment Subscale Composition for New and Previously Administered Blocks at Age 13: 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 13. The item counts are available for each scale as defined in the final Item Response Theory (IRT) scales.

Scale composition for trend blocks as defined after scaling, by item type and scale, age 13 reading long-term trend assessment: 2004

Scale	Multiple-choice items			Dichotomously scored constructed-response items
	Concurrent	Split	Dropped	Concurrent	Split	Dropped
* Four of the dropped items were split beforehand. 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	90	8	6*	5	0	2

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