In the context of IRT,the term discrimination best refers to
A) the degree to which an item differentiates people with respect to some cultural variable.
B) the utility of a test used in personnel selection.
C) the degree to which internal consistency compares to selection precision.
D) the degree to which an item differentiates people with respect to a trait being measured.

Question

Quizplus · Accepted Answer

In IRT, discrimination refers to the degree to which an item is able to differentiate between individuals with respect to the trait being measured. It is a measure of how well an item can distinguish between high and low scorers on the construct being measured. It is not related to cultural variables or test utility. Internal consistency and selection precision are also not directly related to discrimination.

In the Context of IRT,the Term Discrimination Best Refers to