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Direct linkVan Nijlen, Daniel; Janssen, Rianne – Applied Measurement in Education, 2011
The distinction between quantitative and qualitative differences in mastery is essential when monitoring student progress and is crucial for instructional interventions to deal with learning difficulties. Mixture item response theory (IRT) models can provide a convenient way to make the distinction between quantitative and qualitative differences…
Descriptors: Spelling, Indo European Languages, Vowels, Verbal Tests
