Showing 1 - 2 of 2 Research Library Publications

Quantifying the Bias of Non-linear Equating and Score Transformations

Posted: | Matthias von Davier, Brian Clauser

Essays on Contemporary Psychometrics: Pages 163-180

 

This paper shows that using non-linear functions for equating and score transformations leads to consequences that are not commensurable with classical test theory (CTT). More specifically, a well-known theorem from calculus shows that the expected value of a non-linearly transformed variable does not equal the transformed expected value of this variable.

Category:Assessment-Oriented Research, Scoring

Digital Module 28: Unusual Things That Usually Occur in a Credentialing Testing Program

Posted: | Richard A. Feinberg, Carol Morrison, Mark R. Raymond

Educational Measurement: Issues and Practices: Volume 41 - Issue 1 - Pages 95-96

 

Often unanticipated situations arise that can create a range of problems from threats to score validity, to unexpected financial costs, and even longer-term reputational damage. This module discusses some of these unusual challenges that usually occur in a credentialing program.

Category:Assessment-Oriented Research, General Measurement, Reliability/Validity