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dc.contributor.advisorSmith, Jr., Everett V.en_US
dc.contributor.authorRisk, Nicole M.en_US
dc.date.accessioned2015-07-21T15:54:29Z
dc.date.available2015-07-21T15:54:29Z
dc.date.created2015-05en_US
dc.date.issued2015-07-21
dc.date.submitted2015-05en_US
dc.identifier.urihttp://hdl.handle.net/10027/19455
dc.description.abstractA series of CAT simulations were conducted to evaluate the impact of item parameter drift (IPD) in computer adaptive testing (CAT). The simulations varied the amount and magnitude of IPD, as well as the size of the item pool. A baseline condition without the presence of drift was established and used to compare the results of the altered IPD conditions to the non-altered baseline condition. A number of criteria were used to evaluate the effects of IPD on measurement precision, classification, and test efficiency. These included bias, root mean square error (RMSE), absolute average difference (AAD), total percentages of misclassifcation, the number of false positives and false negatives, the total test lengths, and item exposure rates. The results revealed negligible differences when comparing the IPD conditions to the baseline condition for all measures of precision, classification accuracy, and test efficiency. Magnitude of drift appeared to have a larger impact on measurement precision than the number of items with drift.en_US
dc.language.isoenen_US
dc.rightsen_US
dc.rightsCopyright 2015 Nicole M. Risken_US
dc.subjectCATen_US
dc.subjectIPDen_US
dc.subjectRaschen_US
dc.subjectCertification Testingen_US
dc.titleThe Impact of Item Parameter Drift in Computer Adaptive Testing (CAT)en_US
thesis.degree.departmentEducational Psychologyen_US
thesis.degree.disciplineEducational Psychologyen_US
thesis.degree.grantorUniversity of Illinois at Chicagoen_US
thesis.degree.levelDoctoralen_US
thesis.degree.namePhD, Doctor of Philosophyen_US
dc.type.genrethesisen_US
dc.contributor.committeeMemberMyford, Carolen_US
dc.contributor.committeeMemberYin, Yueen_US
dc.contributor.committeeMemberStahl, Johnen_US
dc.contributor.committeeMemberLawless, Kimberlyen_US
dc.type.materialtexten_US


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