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Showing 1 to 3 of 3 for “"Item parameter drift"”.
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Item parameter drift and online calibration
An important assumption of item response theory based computerized adaptive assessment is item parameter invariance. Sometimes, however, item parameters are not invariant across different test administrations due to factors other than sampling error; and this phenomenon is termed item parameter …
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A stepwise test characteristic curve method to detect item parameter drift
An important assumption of item response theory (IRT) based equating is that the item parameters should be invariant over different testing occasions. Sometimes, however, item parameters do not remain invariant due to factors other than sampling error, and this is termed item parameter drift (IPD). …
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Student-Group Item Parameter Drift Impact on Individual and Aggregate Observed Scores
… research into the impact of student-group item parameterdrift (SIPD) —referred to as subpopulation item parameter drift in previous research— on abilityestimates and proficiency classification accuracy when occurring in the discrimination parameterof a 2-PL item response theory (IRT) model. …