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IRT observed-score equating with the non-equivalent groups with covariates design
Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik.ORCID-id: 0000-0001-5549-8262
2017 (Engelska)Ingår i: 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, Cham: Springer, 2017, s. 275-285Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
Cham: Springer, 2017. s. 275-285
Serie
Springer Proceedings in Mathematics and Statistics, ISSN 2194-1009
Nyckelord [en]
NEC design, item respone theory, collateral information
Nationell ämneskategori
Sannolikhetsteori och statistik
Forskningsämne
statistik
Identifikatorer
URN: urn:nbn:se:umu:diva-138067DOI: 10.1007/978-3-319-56294-0_25Scopus ID: 2-s2.0-85020935917ISBN: 978-3-319-56293-3 (tryckt)ISBN: 978-3-319-56294-0 (digital)OAI: oai:DiVA.org:umu-138067DiVA, id: diva2:1129665
Konferens
81st annual meeting of the Psychometric Society, 2016, Asheville, United States, 11 July 2016 through 15 July 2016
Forskningsfinansiär
Vetenskapsrådet, 2014-578Tillgänglig från: 2017-08-05 Skapad: 2017-08-05 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

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Wiberg, Marie

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Totalt: 250 träffar
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