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Direct linkWoods, Carol M. – Applied Psychological Measurement, 2011
Differential item functioning (DIF) occurs when an item on a test, questionnaire, or interview has different measurement properties for one group of people versus another, irrespective of true group-mean differences on the constructs being measured. This article is focused on item response theory based likelihood ratio testing for DIF (IRT-LR or…
Descriptors: Simulation, Item Response Theory, Testing, Questionnaires
DeSarbo, Wayne S.; Lehmann, Donald R.; Hollman, Frances Galliano – Applied Psychological Measurement, 2004
Preference structures that underline a survey or experimental responses may systematically vary during the administration of such measurement. Maturation, learning, fatigue, and response strategy shifts may all affect the sequential elicitation of respondent preferences at different points in the survey or experiment. The consequence of this…
Descriptors: Maximum Likelihood Statistics, Response Style (Tests), Evaluation Methods, Responses
