This article proposes that sampling design effects have potentially huge unrecognized impacts on the results reported by large-scale district and state assessments in the United States. When design effects are unrecognized and unaccounted for they lead to underestimating the sampling error in item and test statistics. Underestimating the sampling…

This article reports on the collaboration of six states to study how simulation-based science assessments can become transformative components of multi-level, balanced state science assessment systems. The project studied the psychometric quality, feasibility, and utility of simulation-based science assessments designed to serve formative purposes…

This study is an evaluation of the psychometric issues associated with estimating objective level scores, often referred to as "subscores." The article begins by introducing the concepts of reliability and validity for subscores from statewide achievement tests. These issues are discussed with reference to popular scaling techniques, classical…

The bookmark standard-setting procedure is an item response theory-based method that is widely implemented in state testing programs. This study estimates standard errors for cut scores resulting from bookmark standard settings under a generalizability theory model and investigates the effects of different universes of generalization and error…

This study empirically examined the behaviors of item and person statistics derived from item response theory and classical test theory, focusing on item and person statistics and using a large-scale statewide assessment. Findings show that the person and item statistics from the two measurement frameworks are quite comparable. (SLD)

This study compares logistic discriminant function analysis for differential item functioning (DIF) with a technique for the detection of DIF that is based on item response theory rather than the Mantel-Haenszel procedure. In this study, the areas between the two item characteristic curves, also called the item characteristic curve method is…

This paper discusses the use of two theories of item analysis and test construction, their strengths and weaknesses, and applications to the design of the Hawaii State Test of Essential Competencies (HSTEC). Traditional analyses of the data collected from the HSTEC field test were viewed from the perspectives of item difficulty levels and item…

This study empirically investigated the potential negative effect of item response theory (IRT) model-data misfit on the degree of invariance of: (1) IRT item parameter estimates (item difficulty and discrimination); and (2) IRT person ability parameter estimates. A large-scale statewide assessment program test database was used, for which the…

The purpose of this study was to describe the Rasch model for measurement and apply the model to examine the relationship between raters, domains of written compositions, and student writing ability. Twenty raters were randomly selected from a group of 87 operational raters contracted to rate essays as part of the 1993 field test of the Georgia…

Created a developmental scale for the North Carolina End-of-Grade Mathematics Tests using a subset of identical test forms administered to adjacent grade levels with Thurstone scaling and Item Response Theory methods. Discusses differences in patterns produced. (Author/SLD)

The Maryland Functional Testing Program (MFTP) uses the Rasch model as the statistical framework for the analysis of test items and scores. This paper is designed to assist the reader in developing an understanding of the fit statistics in the Rasch model. Background materials on application of the Rasch model in statistical analysis of the MFTP…

This study investigated the possible impacts of language and curriculum differences on the performance of test items by subpopulations of students. Focusing on Measurement and Geometry items completed by students in French- and English-language schools in Ontario made it possible to explore the differences and to compare the item response theory…

The Bookmark Standard Setting Procedure (Lewis, Mitzel, and Green, 1996) is an item-response-theory-based standard setting method that has been widely implemented by state testing programs. The primary purposes of this study were to: (1) estimate standard errors for cutscores that result from Bookmark standard settings under a generalizability…

The impact of test item multidimensionality was examined as it affected fitting items on a teacher licensure test to an item response theory (IRT) model. Test item data from the 1990 study of G. W. Guiton and G. Delandshere are used. The Connecticut Elementary Certification Test (CONNECT) is a licensure examination designed to assess the subject…

Use of item response theory (IRT), the delta plot method, and Mantel-Haenszel techniques to assess differential item functioning (DIF) across racial and gender groups associated with the Maryland Test of Citizenship Skills (MTCS) is described. The objective of this research was to determine the: effect of sample size on results from these three…