Unidimensional Vertical Scaling in Multidimensional Space. Research Report. ETS RR-17-29

Autor/in	Carlson, James E.
Titel	Unidimensional Vertical Scaling in Multidimensional Space. Research Report. ETS RR-17-29
Quelle	In: ETS Research Report Series, (2017), (30 Seiten)Infoseite zur Zeitschrift PDF als Volltext kostenfreie Datei Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	2330-8516
Schlagwörter	Test Items; Item Response Theory; Difficulty Level; Scoring; Scaling + Suchen Sie Ihr Suchwort? Test content; Testaufgabe; Item-Response-Theorie; Schwierigkeitsgrad; Bewertung; Scale construction; Skalenkonstruktion
Abstract	In this paper, I consider a set of test items that are located in a multidimensional space, S[subscript M], but are located along a curved line in S[subscript M] and can be scaled unidimensionally. Furthermore, I am demonstrating a case in which the test items are administered across 6 levels, such as occurs in K-12 assessment across 6 grade levels, and for which a unidimensional vertical scale can be developed. I am limiting my coverage to dichotomously scored items because the models are much simpler than those for polytomously scored items. However, the concepts discussed can be extended to the latter type of item. I also limit my demonstrations to a 2-dimensional space, S[subscript 2], so I can geometrically represent my points in a 2-dimensional representation in this article. These concepts can also be extended to a higher-dimensional case. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01