NAEP Technical DocumentationTreatment of Items in the Scaling of the 2008 Mathematics Long-Term Trend Assessment Scales

Items deleted from the final scaling, mathematics long-term trend assessment, by block and age: 2008
Age	Block	NAEP ID	Reason for decision
NOTE: A single overall scale was used. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2008 Mathematics Long-Term Trend Assessment.
9	M3	N331702	To match 2004 scaling
9	M3	N312301	To match 2004 scaling
13	M2	N303001	To match 2004 scaling
	M4	N318101	To match 2004 scaling
	M6	N299401	To match 2004 scaling
17	M2	N308701	To match 2004 scaling
17	M6	N299401	To match 2004 scaling

Cluster items created for final scaling, mathematics long-term trend assessment, by block and age: 2008
Age	Block	NAEP ID	Reason for decision	NAEP IDs of items contributing to cluster
NOTE: A single overall scale was used. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2008 Mathematics Long-Term Trend Assessment.
9	M6	N2909CL	To match 2004 scaling	N290901, N291001

Recoding of polytomous items for scaling, mathematics long-term trend assessment, by block and age: 2008
Age	Block	NAEP ID	Reason for decision	Disposition
NOTE: A single overall scale was used. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2008 Mathematics Long-Term Trend Assessment.
9	M6	N2909CL	To match 2004 scaling	Collapsed categories 0,1,2 becomes 0,0,1

Last updated 14 December 2011 (GF)