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IRT observed-score equating with the non-equivalent groups with covariates design
Umeå University, Faculty of Social Sciences, Umeå School of Business and Economics (USBE), Statistics.ORCID iD: 0000-0001-5549-8262
2017 (English)In: Quantitative Psychology. The 81st annual meeting of the psychometric society, Asheville, North Carolina, 2016 / [ed] L. Andries van der Ark, Marie Wiberg, Steven A. Culpepper, Jeffrey A. Douglas, Wen-Chung Wang, Springer, 2017, 275-285 p.Conference paper, (Refereed)
Abstract [en]

Nonequivalent groups with anchor test (NEAT) design is typically preferred in test score equating, but there are tests which do not administer an anchor test. If the groups are nonequivalent, an equivalent groups (EG) design cannot be recommended. Instead, one can use a nonequivalent groups with covariates (NEC) design. The overall aim of this work was to propose the use of item response theory (IRT) with a NEC design by incorporating the mixed-measurement IRT with covariates model within IRT observed-score equating in order to model both test scores and covariates. Both simulations and a real test example are used to examine the proposed test equating method in comparison with traditional IRT observed-score equating methods with an EG design and a NEAT design. The results show that the proposed method can be used in practice, and the simulations show that the standard errors of the equating are lower with the proposed method as compared with traditional methods.

Place, publisher, year, edition, pages
Springer, 2017. 275-285 p.
Series
Springer Proceedings in Mathematics and Statistics
Keyword [en]
NEC design, item respone theory, collateral information
National Category
Probability Theory and Statistics
Research subject
Statistics
Identifiers
URN: urn:nbn:se:umu:diva-138067DOI: 10.1007/978-3-319-56294-0_25ISBN: 978-3-319-56293-3 (print)ISBN: 978-3-319-56294-0 (electronic)OAI: oai:DiVA.org:umu-138067DiVA: diva2:1129665
Conference
International Meeting of the Psychometric Society
Funder
Swedish Research Council, 2014-578
Available from: 2017-08-05 Created: 2017-08-05 Last updated: 2017-08-05

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf