Measuring Growth with Vertical Scales

Autor/in	Briggs, Derek C.
Titel	Measuring Growth with Vertical Scales
Quelle	In: Journal of Educational Measurement, 50 (2013) 2, S.204-226 (23 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0022-0655
DOI	10.1111/jedm.12011
Schlagwörter	Measurement; Scaling; Validity; Test Interpretation; Reading Tests; Achievement Gains; Reading Achievement; Item Response Theory; Lexile Scale of Reading + Suchen Sie Ihr Suchwort? Messverfahren; Scale construction; Skalenkonstruktion; Gültigkeit; Test analysis; Testauswertung; Lesetest; Achievement gain; Leistungssteigerung; Leseleistung; Item-Response-Theorie
Abstract	A vertical score scale is needed to measure growth across multiple tests in terms of absolute changes in magnitude. Since the warrant for subsequent growth interpretations depends upon the assumption that the scale has interval properties, the validation of a vertical scale would seem to require methods for distinguishing interval scales from ordinal scales. In taking up this issue, two different perspectives on educational measurement are contrasted: a metaphorical perspective and a classical perspective. Although the metaphorical perspective is more predominant, at present it provides no objective methods whereby the properties of a vertical scale can be validated. In contrast, when taking a classical perspective, the axioms of additive conjoint measurement can be used to test the hypothesis that the latent variable underlying a vertical scale is quantitative (supporting ratio or interval properties) rather than merely qualitative (supporting ordinal or nominal properties). The application of such an approach is illustrated with both a hypothetical example and by drawing upon recent research that has been conducted on the Lexile scale for reading comprehension. (Contains 4 figures and 10 notes.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10