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Effects of calibration sample size and item bank size on abilityestimation in computerized adaptive testing

dc.contributor.author Şahin, Alper
dc.contributor.author Weiss, DJ.
dc.contributor.other Yabancı Diller Bölümü
dc.date.accessioned 2020-05-08T22:29:56Z
dc.date.available 2020-05-08T22:29:56Z
dc.date.issued 2015
dc.department Çankaya Üniversitesi, Fen-Edebiyat Fakültesi, İngiliz Dili ve Edebiyatı Bölümü en_US
dc.description.abstract This study aimed to investigate the effects of calibration sample size and item bank size on examinee ability estimation in computerized adaptive testing (CAT). For this purpose, a 500-item bank pre-calibrated using the three-parameter logistic model with 10,000 examinees was simulated. Calibration samples of varying sizes (150, 250, 350, 500, 750, 1,000, 2,000, 3,000, and 5,000) were selected from the parent sample, and item banks that represented small (100) and medium size (200 and 300) banks were drawn from the 500-item bank. Items in these banks were recalibrated using the drawn samples, and their estimated parameters were used in post-hoc simulations to re-estimate ability parameters for the simulated 10,000 examinees. The findings showed that ability estimates in CAT are robust against fluctuations in item parameter estimation and that accurate ability parameter estimates can be obtained with a calibration sample of 150 examinees. Moreover, a 200-item bank pre-calibrated with as few as 150 examinees can be used for some purposes in CAT as long as it has sufficient information at targeted ability levels. en_US
dc.description.publishedMonth 12
dc.identifier.citation Şahin, Alper; Weiss, DJ., "Effects of calibration sample size and item bank size on abilityestimation in computerized adaptive testing" Educational Sciences-Theory & Practice, Vol.15, No.6, pp.1585-1595 (2015). en_US
dc.identifier.endpage 1595 en_US
dc.identifier.issn 1303-0485
dc.identifier.issue 6 en_US
dc.identifier.startpage 1585 en_US
dc.identifier.uri https://hdl.handle.net/20.500.12416/3659
dc.identifier.volume 15 en_US
dc.institutionauthor Şahin, Dr.Alper
dc.language.iso en en_US
dc.publisher EDAM en_US
dc.relation.ispartof Educational Sciences-Theory & Practice en_US
dc.rights info:eu-repo/semantics/closedAccess en_US
dc.subject Computerized Adaptive Testing en_US
dc.subject Calibration Sample Size en_US
dc.subject Ability Estimation Accuracy en_US
dc.subject Pretest Item Calibration en_US
dc.subject Item Response Theory en_US
dc.title Effects of calibration sample size and item bank size on abilityestimation in computerized adaptive testing tr_TR
dc.title Effects of Calibration Sample Size and Item Bank Size on Abilityestimation in Computerized Adaptive Testing en_US
dc.type Article en_US
dspace.entity.type Publication
relation.isAuthorOfPublication 6222f1b4-6e77-4e6b-b1a1-4a4e94f8ecb9
relation.isAuthorOfPublication.latestForDiscovery 6222f1b4-6e77-4e6b-b1a1-4a4e94f8ecb9
relation.isOrgUnitOfPublication b719abf8-6508-4039-9b42-2bfb81dd36bc
relation.isOrgUnitOfPublication.latestForDiscovery b719abf8-6508-4039-9b42-2bfb81dd36bc

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