Constructing a Robust Score Scale from IRT Scores with Informed Boundaries

Autor/inn/en	Choe, Edison M.; Han, Kyung T.
Titel	Constructing a Robust Score Scale from IRT Scores with Informed Boundaries
Quelle	In: Journal of Educational Measurement, 59 (2022) 1, S.4-21 (18 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0022-0655
DOI	10.1111/jedm.12307
Schlagwörter	Scores; Item Response Theory; Test Items; Test Format; Guidelines + Suchen Sie Ihr Suchwort? Item-Response-Theorie; Test content; Testaufgabe; Testentwicklung; Richtlinien
Abstract	In operational testing, item response theory (IRT) models for dichotomous responses are popular for measuring a single latent construct [theta], such as cognitive ability in a content domain. Estimates of [theta], also called IRT scores or [theta hat], can be computed using estimators based on the likelihood function, such as maximum likelihood (ML), weighted likelihood (WL), maximum a posteriori (MAP), and expected a posteriori (EAP). Although the parameter space of [theta] is theoretically unrestricted, the range of finite [theta hat] is constrained by the estimator and test form properties, which is important to consider but often overlooked when developing a score scale for reporting purposes. Irrespective of the estimator or test forms at hand, a common practice is to fix arbitrary points symmetric about zero (e.g., -4 and 4) as anchors for deriving a score transformation, possibly resulting in unintended gaps or truncations at the extremes. Therefore, a systematic framework is proposed for using IRT scores to construct a robust score scale with informed boundaries that are logical and consistent across test forms. (As Provided).
Anmerkungen	Wiley. Available from: John Wiley & Sons, Inc. 111 River Street, Hoboken, NJ 07030. Tel: 800-835-6770; e-mail: cs-journals@wiley.com; Web site: https://www.wiley.com/en-us
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01