Screening test items for differential item functioning
N. T. Longford
Abstract
This paper adapts a new method for medical screening
to differential item functioning (DIF).
Its essential elements are explicit declarations of the level of DIF
that is acceptable and of the loss function that quantifies
the consequences of the two kinds of inappropriate classifications
of an item. Instead of a single level and a single function,
sets of plausible levels and plausible functions may be declared.
An example is presented and some extensions are outlined.
Journal of Educational and Behavioral Statistics
39, 3-21, 2014.
January 2014.