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Rejoinder to Commentaries on Lyu, Bolt and Westby’s “Exploring the Effects of Item Specific Factors in Sequential and IRTree Models”

Author

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  • Weicong Lyu

    (University of Wisconsin-Madison)

  • Daniel M. Bolt

    (University of Wisconsin-Madison)

Abstract

We respond to the commentaries on Lyu, Bolt and Westby’s “Exploring the effects of item specific factors in sequential and IRTree models.” The commentaries raise important points that allow us to clarify our theoretical expectation for item specific factors in many educational and psychological test items. At the same time, we agree with the commentaries in acknowledging challenges associated with providing empirical evidence for their presence and reflect on strategies that might support their estimation. We maintain that the principal concern is the ambiguity item specific factors create in attempting to interpret or use the parameters beyond the first node.

Suggested Citation

  • Weicong Lyu & Daniel M. Bolt, 2023. "Rejoinder to Commentaries on Lyu, Bolt and Westby’s “Exploring the Effects of Item Specific Factors in Sequential and IRTree Models”," Psychometrika, Springer;The Psychometric Society, vol. 88(3), pages 1026-1031, September.
    • Handle: RePEc:spr:psycho:v:88:y:2023:i:3:d:10.1007_s11336-023-09913-w
    DOI: 10.1007/s11336-023-09913-w
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    1. Weicong Lyu & Daniel M. Bolt & Samuel Westby, 2023. "Exploring the Effects of Item-Specific Factors in Sequential and IRTree Models," Psychometrika, Springer;The Psychometric Society, vol. 88(3), pages 745-775, September.
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