NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Scale Composition by Item Type for New and Trend Blocks → Reading Long-Term Trend Assessment Subscale Composition for New and Previously Administered Blocks: 2008

NAEP Technical DocumentationReading Long-Term Trend Assessment Subscale Composition for New and Previously Administered Blocks: 2008

Scale composition for new blocks as defined after scaling, reading long-term trend assessment, by item type and age: 2008

Age	Multiple choice items		Dichotomously scored constructed-response items		Polytomously scored constructed-response items
	Scaled	Dropped	Scaled	Dropped	Polytomous (uncollapsed)	Dichotomous collapsed	Polytomous collapsed	Dropped
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), 2008 Reading Long-Term Assessment.
9	24	0	0	0	0	1	0	0
13	9	0	0	0	1	0	0	0
17	10	0	0	0	1	0	0	0

Scale composition for trend blocks as defined after scaling, reading long-term trend assessment, by item type and age: 2008

Age	Multiple choice items			Dichotomously scored constructed-response items			Polytomously scored constructed-response items
	Concurrent	Split	Dropped	Concurrent	Split	Dropped	Concurrent polytomous (uncollapsed)	Concurrent dichotomous collapsed	Concurrent polytomous collapsed	Split	Dropped
†  Not applicable. ** One polytomous item was both split and collapsed. 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. "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), 2008 Reading Long-Term Trend Assessment.
9	60	0	0	0	0	0	2	†	1**	1**	0
13	89	0	2	0	0	0	4	0	1	1	0
17	84	1	1	0	0	0	5	0	0	2	0

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