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College of Arts & Sciences
Department of Statistics


Neil Dorans Colloquium

Thursday, November 19, 2015 - 2:45pm

Statistics Department Colloquium

Where: Close-Hipp Building, Room 364

Speaker: Neil Dorans

Affiliation: Educational Testing Services

Title:  Linking Outcomes Obtained from Multiple Instruments

Abstract:  When the outcomes of assessment instruments are to be used interchangeably, these outcomes need to be equated or made comparable. If the outcomes of different assessment instruments are not equated, inferences based on them could be flawed, and might have serious consequences such as misperceptions about the efficacy of a treatment. It would be nice if outcomes were comparable as a result of careful instrument design. In reality, some type of statistical intervention is often needed to check for comparability and to make adjustments if necessary.

This presentation, which will be conceptual in nature and hence light on the mathematics, will address key questions associated with the linking of outcomes. What is meant by outcome linking and equating? How does equating differ from other types of linking? What are common data collection designs used to capture data for outcomes linking? What are some of the standard statistical procedures used to link outcomes? What assumptions do they make? What procedures can be used to assess whether outcomes can be used interchangeably?