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NAEP Analysis and ScalingEstimation of NAEP Score ScalesNAEP Assessment IRT ParametersCivics Assessment IRT Parameters → IRT Parameters for the Single Overall Scale, Grade 8 Civics National Assessment, by Item and Block: 2014
NAEP Technical DocumentationIRT parameters for the single overall scale, grade 8 civics national assessment, by item and block: 2014
BlockItemNAEP ID aj bj cj dj1 dj2 dj3 dj4
† Not applicable; c parameters are not estimated for the two-parameter logistic model or generalized partial credit models, and parameters are not estimated for two-parameter or three-parameter models.
NOTE: For item jaj represents the discriminatory power of the item, bj represents a location parameter related to item difficulty, cj represents the guessing parameter, and djrepresents the category threshold parameter for category i. The parameter is assumed to be exactly zero and is not estimated for items scaled with the two-parameter logistic model. For item jdji may not sum to zero because of rounding. In 2014, grades 4 and 12 were not assessed.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2014 Civics Assessment.

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Last updated 30 August 2021 (ML)