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September 10, 2025Kastamonu Eğitim DergisiOpen Access

Examination of Scale Transformation and Test Equating Methods in Testlet Based Tests

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Authors

HDHarun DİLEKKKKübra Atalay KabasakalSGSebahat GÖREN

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Overview

Analysis compares test equating and scale transformation under item response theory models, highlighting the impact of sample size on accuracy.

Key Points

  • Lower error rates were observed when using the bifactor model for test equating in science tests.
  • Scale transformation using the unidimensional item response theory model yielded better accuracy in testlet-based assessments.
  • Increased sample sizes generally lead to decreased estimation errors, particularly for the testlet response theory model.
  • The study shows practical implications of testlet effects in assessments, supporting reliable score equating.

Cite This Study

DİLEK et al. (2025) studied this question.

synapsesocial.com/papers/68c23ed7b210217d64794860https://doi.org/10.24106/kefdergi.1750267
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