Applying IRT Model in Validating a Dichotomously-Scored Test

Conference: The Asian Conference on Education (ACE2022)
Title: Applying IRT Model in Validating a Dichotomously-Scored Test
Stream: Assessment Theories & Methodologies
Presentation Type: Live-Stream Presentation
Authors:
Arlene Mendoza, Pangasinan State University, Philippines

Abstract:

This study applied Rasch model in validating a departmentalized examination with 50 items taken by 300 randomly chosen students. Rasch analysis revealed that the item and person reliability were high. However, misfit items appeared and evidence of multidimensionality existed. Moreover, the test appeared to be relatively difficult as reflected in the wright map. These findings suggested that even a test underwent a face validity through the subject experts, an objective measurement such as the Rasch model could be helpful in achieving greater precision in diagnosing test items and consequently constructing a better measure in the assessment of students’ ability.

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