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Differential Item Functioning

ISBN: 9781412954945
AUTOR: Everson,Howard Osterlind,Steven

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...t of the construct of focus in the test, then the test would be biased ... Differential Item Functioning | Columbia Public Health ... . Differential Item Functioning (DIF) and Differential Test Functioning (DTF) analyses for polytomous items were performed using DIFAS 4 (Penfield, 2007, Penfield and Algina, 2003). In DIF analysis, assessment is made between a 'reference' and a 'focal' group. H. Wainer, Model-Based Standardized Measurement of an Item's Differential Impact. J.R. Donoghue, P.W. Holland, D.T. Thayer, A Monte Carlo Study of Fac ... PDF Differential Item Functioning (DIF): What Functions ... ... . J.R. Donoghue, P.W. Holland, D.T. Thayer, A Monte Carlo Study of Factors That Affect the Mantel-Haenszel and Standardization Measures of Differential Item Functioning. J.O. Ramsay, Comments on the Monte Carlo Study of Donoghue, Holland, and Thayer. differential item functioning (DIF) is central to the inves-tigation of the equivalence of items contained in new and already established measures. Many investigations involve comparisons of groups defined by socioeconomic or other attributes. Groups may be compared in terms of outcome measures such as physical functioning, psychological dis- Establishing measurement equivalence is important because inaccurate assessment may lead to incorrect estimates of effects in research, and to suboptimal decisions at the individual, clinical level. Examination of differential item functioning (DIF) is a method for studying measurement equivalence. An item (i.e., one question in a longer scale) exhibits DIF if the item response differs across ... Differential Item Functioning (DIF) is a method used to: asked Jun 20, 2016 in Counseling by PerkinE. a. validate multicultural assessments b. aid in data interpretation c. identify biased test items d. interpret multicultural aptitude. introductory-and-advanced-courses Differential Item Functioning (DIF) [engl.] «differentielle Itemfunktionsweise», [lat. differentia Unterschied], [DIA], stellt eine Technik zur Analyse der Testfairness von Einzelitems einer psychometrischen Skala dar, die i. R. der Modellierung mittels der probabilistischen Testtheorie (Item-Response-Theorie (IRT)) und insbes. des Rasch-Modell zur Anwendung kommt. Rasch analysis with a focus on Differential Item Functioning (DIF) is increasingly used for examination of psychometric properties of health outcome measures. To take account of DIF in order to retain precision of measurement, split of DIF-items into separate sample specific items has become a frequently used technique. The purpose of the paper is to present and summarise recent advances of ... This framework is now referred to as differential item functioning (DIF), a term coined in a seminal chapter on DIF by Holland and Thayer (1988). The following decade bore witness to a tremendous amount of interest and research directed towards the concept of DIF, and its measurement. Objective The aims were to review practices concerning Differential Item Functioning (DIF) detection in composite measurement scales, particularly those used in health research, and to provide guidance on how to proceed if statistically significant DIF is detected. Methods This work specifically addressed the Rasch model which is the subject of growing interest in the field of health owing to ... Differential item functioning (DIF) is a technique used to examine whether items function differently across different groups. The DIF analysis helps detect bias in an assessment to ensure the fairness of the assessment. However, most of the previous research has focused on high-stakes assessments. Differential Item Functioning | Encyclopedia of Research Design Search form. Not Found. Show page numbers . Download PDF . Sections . Menu. Opener. Search form. ... Item bias represents a threat to the validity of test scores in many different disciplines. The differential attainment of candidates in the various groups does however remain, and remains unexplained, but cannot be attributed to differential item functioning in relation to sex or ethnicity of particular questions in this multiple choice assessment across the range of diets analysed. Introduction: We present an ordinal logistic regression model for identification of items with differential item functioning (DIF) and apply this model to a Mini-Mental State Examination (MMSE) dataset. We employ item response theory ability estimation in our models. Three nested ordinal...