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Article ID: 2268
Last updated: 23 Nov, 2008
Frequently Asked Question:What is Item Response Theory (IRT) and why was Reading Comprehension changed to use it?
Answer:IRT allowed us to weigh each item in the grade level for difficulty. The difficult items for Grade 1 are the easy items for Grade 2. IRT was a statistical method that allowed us to represent these differences and ensure that scores were not being underestimated for the lower functioning students.
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