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Item Parameter Drift As An Indication Of Differential Opportunity To Learn: An Exploration Of Item Flagging Methods & Accurate Classification Of Examinees, Tia M. Sukin

Open Access Dissertations

The presence of outlying anchor items is an issue faced by many testing agencies. The decision to retain or remove an item is a difficult one, especially when the content representation of the anchor set becomes questionable by item removal decisions. Additionally, the reason for the aberrancy is not always clear, and if the performance of the item has changed due to improvements in instruction, then removing the anchor item may not be appropriate and might produce misleading conclusions about the proficiency of the examinees. This study is conducted in two parts consisting of both a simulation and empirical data …