Comparing the Effectiveness of Several Irt Based Appropriateness Measures in Detecting Unusual Response Patterns

Abstract

The study compared nine indices of response pattern appropriateness based on IRT with respect to their relation to the total test score and their, effectiveness in detecting unusual response patterns. Three groups of response patterns were analyzed; a group of cooperative examinees, a group of uncooperative examinees and a group of randomly generated response patterns. The comparison among the indices was based on their capability to differentiate among the three groups and on the percentages of correct and incorrect classification of examinees to their actual groups based on their score on the index.