Conference Paper: Considerations to evaluate equating results based on IRT calibration and equating

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Title	Considerations to evaluate equating results based on IRT calibration and equating
Authors	Zhao, Y
Issue Date	2011
Publisher	The Psychometric Society.
Citation	The 76th Annual and the 17th International Meeting of the Psychometric Society (IMPS 2011), Hong Kong, 18-22 July 2011. In Conference Program of the IMPS 2011, 2011, p. 232 [How to Cite?]
Abstract	Item Response Theory (IRT) is commonly used to calibrate and equate the state assessment test programs. Equating is one of the crucial steps to generate score conversion table which is used for producing scale score and proficiency level for each individual student. Whether or not the equating is conducted properly considering its practical consequences? Whether or not the anchor set is appropriately applied for the use of equating? Are there any outlier anchor items to be removed from the anchor set? This presentation highlights some considerations to evaluate equating results, including IRT model fit, Test Characteristic Curves (TCCs), score distributions, the score and proficiency profile from the reference year, and property of the anchor set. Also, the consideration and alternative to remove outlier anchor items is discussed. Examples are illustrated as well to address the practical consequences of equating.
Description	Parallel Session: Equating and Linking: no. D1-LP-06

DC Field	Value
dc.contributor.author	Zhao, Y
dc.date.accessioned	2012-08-16T06:25:31Z
dc.date.available	2012-08-16T06:25:31Z
dc.date.issued	2011
dc.description.abstract	Item Response Theory (IRT) is commonly used to calibrate and equate the state assessment test programs. Equating is one of the crucial steps to generate score conversion table which is used for producing scale score and proficiency level for each individual student. Whether or not the equating is conducted properly considering its practical consequences? Whether or not the anchor set is appropriately applied for the use of equating? Are there any outlier anchor items to be removed from the anchor set? This presentation highlights some considerations to evaluate equating results, including IRT model fit, Test Characteristic Curves (TCCs), score distributions, the score and proficiency profile from the reference year, and property of the anchor set. Also, the consideration and alternative to remove outlier anchor items is discussed. Examples are illustrated as well to address the practical consequences of equating.
dc.description.nature	link_to_OA_fulltext
dc.description	Parallel Session: Equating and Linking: no. D1-LP-06
dc.identifier.citation	The 76th Annual and the 17th International Meeting of the Psychometric Society (IMPS 2011), Hong Kong, 18-22 July 2011. In Conference Program of the IMPS 2011, 2011, p. 232 [How to Cite?]
dc.identifier.epage	232
dc.identifier.hkuros	203307
dc.identifier.spage	232
dc.identifier.uri	http://hdl.handle.net/10722/160930
dc.language	eng
dc.publisher	The Psychometric Society.
dc.relation.ispartof	Conference Program of the 76th Annual and 17th International Meeting of the Psychometric Society, IMPS 2011
dc.title	Considerations to evaluate equating results based on IRT calibration and equating
dc.type	Conference_Paper

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