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Download full textPuhan, Gautam; Liang, Longjuan – Educational Testing Service, 2011
Because the demand for subscores is ever increasing, this study examined two different approaches for equating subscores: (a) equating a subscore on the new form to the same subscore in the old form using internal common items as the anchor to conduct the equating, and (b) equating a subscore on the new form to the same subscore in the old form…
Descriptors: Equated Scores, Scaling, Raw Scores, Methods
Moses, Tim; Liu, Jinghua – Educational Testing Service, 2011
In equating research and practice, equating functions that are smooth are typically assumed to be more accurate than equating functions with irregularities. This assumption presumes that population test score distributions are relatively smooth. In this study, two examples were used to reconsider common beliefs about smoothing and equating. The…
Descriptors: Equated Scores, Data Analysis, Scores, Methods
Dorans, Neil J.; Moses, Tim P.; Eignor, Daniel R. – Educational Testing Service, 2010
Score equating is essential for any testing program that continually produces new editions of a test and for which the expectation is that scores from these editions have the same meaning over time. Particularly in testing programs that help make high-stakes decisions, it is extremely important that test equating be done carefully and accurately.…
Descriptors: Equated Scores, Methods, Data Collection, Data Processing
Chen, Haiwen; Holland, Paul – Educational Testing Service, 2009
In this paper, we develop a new chained equipercentile equating procedure for the nonequivalent groups with anchor test (NEAT) design under the assumptions of the classical test theory model. This new equating is named chained true score equipercentile equating. We also apply the kernel equating framework to this equating design, resulting in a…
Descriptors: True Scores, Equated Scores, Test Theory, Methods
Grant, Mary C.; Zhang, Lilly; Damiano, Michele – Educational Testing Service, 2009
This study investigated kernel equating methods by comparing these methods to operational equatings for two tests in the SAT Subject Tests[TM] program. GENASYS (ETS, 2007) was used for all equating methods and scaled score kernel equating results were compared to Tucker, Levine observed score, chained linear, and chained equipercentile equating…
Descriptors: Equated Scores, Methods, Comparative Analysis, College Entrance Examinations
Sinharay, Sandip; Holland, Paul W. – Educational Testing Service, 2008
The nonequivalent groups with anchor test (NEAT) design involves missing data that are missing by design. Three popular equating methods that can be used with a NEAT design are the poststratification equating method, the chain equipercentile equating method, and the item-response-theory observed-score-equating method. These three methods each…
Descriptors: Equated Scores, Test Items, Item Response Theory, Data
