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On Attempting to Do What Lord Said Was Impossible: Commentary on van der Linden's 'Some Conceptual Issues in Observed-Score Equating'.

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Title: On Attempting to Do What Lord Said Was Impossible: Commentary on van der Linden's 'Some Conceptual Issues in Observed-Score Equating'.
Authors: Dorans, Neil J.1 ndorans@ets.org
Source: Journal of Educational Measurement. Fall2013, Vol. 50 Issue 3, p304-314. 11p.
Subject Terms: *Item response theory, *Language & languages, Symmetry
Company/Entity: Educational Testing Service
People: Holland, Paul
Abstract: van der Linden (this issue) uses words differently than Holland and Dorans. This difference in language usage is a source of some confusion in van der Linden's critique of what he calls equipercentile equating. I address these differences in language. van der Linden maintains that there are only two requirements for score equating. I maintain that the requirements he discards have practical utility and are testable. The score equity requirement proposed by Lord suggests that observed score equating was either unnecessary or impossible. Strong equity serves as the fulcrum for van der Linden's thesis. His proposed solution to the equity problem takes inequitable measures and aligns conditional error score distributions, resulting in a family of linking functions, one for each level of θ. In reality, θ is never known. Use of an anchor test as a proxy poses many practical problems, including defensibility. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Educational Measurement is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: On Attempting to Do What Lord Said Was Impossible: Commentary on van der Linden's 'Some Conceptual Issues in Observed-Score Equating'.
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  Data: van der Linden (this issue) uses words differently than Holland and Dorans. This difference in language usage is a source of some confusion in van der Linden's critique of what he calls equipercentile equating. I address these differences in language. van der Linden maintains that there are only two requirements for score equating. I maintain that the requirements he discards have practical utility and are testable. The score equity requirement proposed by Lord suggests that observed score equating was either unnecessary or impossible. Strong equity serves as the fulcrum for van der Linden's thesis. His proposed solution to the equity problem takes inequitable measures and aligns conditional error score distributions, resulting in a family of linking functions, one for each level of θ. In reality, θ is never known. Use of an anchor test as a proxy poses many practical problems, including defensibility. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Educational Measurement is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1111/jedm.12017
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 304
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      – SubjectFull: Item response theory
        Type: general
      – SubjectFull: Language & languages
        Type: general
      – SubjectFull: Symmetry
        Type: general
      – SubjectFull: Educational Testing Service
        Type: general
      – SubjectFull: Holland, Paul
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      – TitleFull: On Attempting to Do What Lord Said Was Impossible: Commentary on van der Linden's 'Some Conceptual Issues in Observed-Score Equating'.
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              Text: Fall2013
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