Differential item functioning (DIF) is present when something about the characteristics of a test taker interferes with the relationship between ability and item responses. Nonuniform DIF exists when there is interaction between ability level and group membership. The aim of the present study proposes a classification of nonuniform DIF severity grade, taking into account the family of Rasch models.
A proposal for categorizing non uniform DIF in polytomous items
GOLIA, Silvia
2012-01-01
Abstract
Differential item functioning (DIF) is present when something about the characteristics of a test taker interferes with the relationship between ability and item responses. Nonuniform DIF exists when there is interaction between ability level and group membership. The aim of the present study proposes a classification of nonuniform DIF severity grade, taking into account the family of Rasch models.File in questo prodotto:
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