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  1. Application of a General Polytomous Testlet Model to the Reading Section of a Large-Scale English Language Assessment

    Author(s): Li, Yanmei ; Li, Shuhong ; Wang, Lin

    Publication Year: 2010

    Source: ETS Research Report

  2. Examining the Impact of Drifted Polytomous Anchor Items on Test Characteristic Curve (TCC) Linking and IRT True Score Equating

    Author(s): Li, Yanmei

    Publication Year: 2012

    Source: ETS Research Report

  3. A Trend-Scoring Study for the TOEFL iBT Speaking and Writing Sections

    Author(s): Li, Yanmei ; Brown, Terran

    Publication Year: 2013

    Source: ETS Research Memorandum

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