Ensuring the future of computerized adaptive testing

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Abstract

Capitalization on chance is a huge problem in computerized adaptive testing (CAT) when Fisher information is used to select the items. Maximizing Fisher information tends to favor items with positive estimation errors in the discrimination parameter and negative estimation errors in the guessing parameter. As a result, information in the resulting tests is overestimated and measurement precision is lower than expected. Since reduction of test length is one of the most important selling points of CAT, this is a serious threat to both the validity and viability of this test administration mode. In this chapter, robust test assembly is presented as an alternative method that accounts for uncertainty in the item parameters during test assembly
Original languageEnglish
Title of host publicationPsychometrics in Practice at RCEC
EditorsTheo J.H.M. Eggen, Bernard P. Veldkamp
PublisherRCEC
Pages39-50
ISBN (Print)9789036533744
DOIs
Publication statusPublished - 2012

Publication series

Name
PublisherRCEC

Keywords

  • Automated test assembly
  • Computerized Adaptive Testing
  • capitalization on chance
  • item parameter uncertainty
  • robust test assembly
  • 0-1 LP

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