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Applied Psychological…

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Ramsay-Curve Differential Item Functioning

Peer reviewed

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Woods, 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

Measuring Attitudes with a Threshold Model Drawing on a Traditional Scaling Concept.

Peer reviewed

Rost, Jurgen – Applied Psychological Measurement, 1988

A generalized Rasch model is presented for measuring attitudes; it is based on the concepts of Thurstone's method of successive intervals. Benefits of the model are illustrated with a study of students' (N=4,035 fifth through ninth graders) interest in physics. (SLD)

Descriptors: Attitude Measures, Children, Elementary Secondary Education, Equations (Mathematics)