Choosing an Appropriate Model for Investigating the Tasks of School in Mathematics after Grade VII According to IRT Methods

Pavlin Tsonev
“Georgi Benkovski” Bulgarian Air Force Academy - Dolna Mitropolia, Bulgaria

https://doi.org/10.53656/math2023-5-5-cho

Abstract. In the article the methods of Item Response Theory were used for analyzing the measuring qualities of the test tasks with a selectable answer from the National External Evaluation for the Grade 7 conducted in 2021 in the Sofiacity and Pleven districts. After agreement with the empirical data, the choice of the two-parameter model was justified using this methodology. A comparison was made between the obtained data and those from the Classical Test Theory.
Keywords: Item Response Theory; probabilistic modeling; multiple-choice test
items; difficulty; discriminating power

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