Latent structure
Rasch Model — One-Parameter Logistic IRT
The Rasch model, introduced by Georg Rasch in 1960, is the simplest member of the Item Response Theory (IRT) family. It assigns a single difficulty parameter to each test item and places both item difficulties and person abilities on the same logit scale, enabling direct, sample-independent comparison of items and persons.
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Sources
- Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests. Danish Institute for Educational Research, Copenhagen. link ↗
- Bond, T. G. & Fox, C. M. (2015). Applying the Rasch Model: Fundamental Measurement in the Human Sciences (3rd ed.). Routledge. ISBN: 978-0-415-83342-1
Related methods
Referenced by
2PL IRT3PL IRTCFA — Scale ValidationCognitive Diagnosis ModelComputerized adaptive test item analysisComputerized adaptive test item response theoryComputerized adaptive test Rasch modelComputerized Adaptive TestingDifferential Item FunctioningG-TheoryGRMItem Response TheoryKnowledge TracingMcDonald's OmegaMulti-group Rasch modelMultilevel Rasch ModelOrdinal Rasch ModelPCM / GPCMPolytomous Rasch ModelRobust Differential Item FunctioningRobust Rasch ModelShort form Rasch modelShort-Form IRTTest Equating