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Differential Item Functioning for Accommodated Students with Disabilities: Effect of Differences in Proficiency Distributions
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Quesen, Sarah – ProQuest LLC, 2016
When studying differential item functioning (DIF) with students with disabilities (SWD) focal groups typically suffer from small sample size, whereas the reference group population is usually large. This makes it possible for a researcher to select a sample from the reference population to be similar to the focal group on the ability scale. Doing…
Descriptors: Test Items, Academic Accommodations (Disabilities), Testing Accommodations, Disabilities
Grain Size and Parameter Recovery with TIMSS and the General Diagnostic Model
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Skaggs, Gary; Wilkins, Jesse L. M.; Hein, Serge F. – International Journal of Testing, 2016
The purpose of this study was to explore the degree of grain size of the attributes and the sample sizes that can support accurate parameter recovery with the General Diagnostic Model (GDM) for a large-scale international assessment. In this resampling study, bootstrap samples were obtained from the 2003 Grade 8 TIMSS in Mathematics at varying…
Descriptors: Achievement Tests, Foreign Countries, Elementary Secondary Education, Science Achievement
2013 Mathematics Assessment Report Card: Summary Data Tables for National and State Sample Sizes, Participation Rates, and Proportions of SD and ELL Students Identified. [Technical Appendix. NCES 2014-451]
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National Center for Education Statistics, 2013
This document represents one of three appendices associated with "The Nation's Report Card: A First Look--2013 Mathematics and Reading. National Assessment of Educational Progress at Grade 4 and 8. NCES 2014-451." It includes tabular data relating to the mathematics portion of the National Assessment of Education Progress at Grade 4 and…
Descriptors: Tables (Data), Mathematics Achievement, Sample Size, Participation
Does Type Matter: Evaluating the Effectiveness of Four-Function and Graphing Calculators
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Bouck, Emily – Journal of Computers in Mathematics and Science Teaching, 2010
Calculators are a controversial, yet widely used tool in mathematics education for all students and especially for students with disabilities. However, little research has explored calculators and students with disabilities. This paper explored the influence of calculator type (four-function and graphing) on the mathematical performance of…
Descriptors: Mathematics Education, Disabilities, Graphing Calculators, Evaluation