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Evolving Perspectives on Item Difficulty by timobechger is a document available to read on EtoBox.

What is Evolving Perspectives on Item Difficulty about?

1. The document argues that item difficulty is not an immutable property of an item, but rather is a function of the education of the persons taking the item and can change over time or across groups. 2. Item difficulty is defined as the proportion of persons in a population who answer the item correctly. In IRT models, item difficulty parameters estimate this proportion but do not necessarily have a simple relationship with it. 3. If item difficulty is found to vary across populations in a way that vio

Author

timobechger

Language

EN