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Download full textLu, Ru; Haberman, Shelby; Guo, Hongwen; Liu, Jinghua – ETS Research Report Series, 2015
In this study, we apply jackknifing to anchor items to evaluate the impact of anchor selection on equating stability. In an ideal world, the choice of anchor items should have little impact on equating results. When this ideal does not correspond to reality, selection of anchor items can strongly influence equating results. This influence does not…
Descriptors: Test Construction, Equated Scores, Test Items, Sampling
Guo, Hongwen; Puhan, Gautam; Walker, Michael – ETS Research Report Series, 2013
In this study we investigated when an equating conversion line is problematic in terms of gaps and clumps. We suggest using the conditional standard error of measurement (CSEM) to measure the scale scores that are inappropriate in the overall raw-to-scale transformation.
Descriptors: Equated Scores, Test Items, Evaluation Criteria, Error of Measurement
Guo, Hongwen; Liu, Jinghua; Curley, Edward; Dorans, Neil – ETS Research Report Series, 2012
This study examines the stability of the "SAT Reasoning Test"™ score scales from 2005 to 2010. A 2005 old form (OF) was administered along with a 2010 new form (NF). A new conversion for OF was derived through direct equipercentile equating. A comparison of the newly derived and the original OF conversions showed that Critical Reading…
Descriptors: Aptitude Tests, Cognitive Tests, Thinking Skills, Equated Scores
Haberman, Shelby J.; Guo, Hongwen; Liu, Jinghua; Dorans, Neil J. – ETS Research Report Series, 2008
This study uses historical data to explore the consistency of SAT® I: Reasoning Test score conversions and to examine trends in scaled score means. During the period from April 1995 to December 2003, both Verbal (V) and Math (M) means display substantial seasonality, and a slight increasing trend for both is observed. SAT Math means increase more…
Descriptors: College Entrance Examinations, Thinking Skills, Logical Thinking, Scaling
