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2013-04-01
Okan Bulut, Kory Vue, Julio C. Cabrera, Luke Stanke, Michael C. Rodriguez, José R. Palma
Item parameter drift (IPD) is defined as differential change in item parameters or ability estimates over time or testing occasions. Unlike previous IPD studies that have focused on change in item parameters over time, this study examined IPD to detect change in item parameters (construct shift)...
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