Measurement Estimation Accuracy: A Comparison of Different Approaches

dc.contributor.author	Weiher, Dana Farina
dc.date.accessioned	2023-07-11T11:14:24Z
dc.date.available	2023-07-11T11:14:24Z
dc.date.issued	2023
dc.description.abstract	To determine the accuracy of an estimate, it is common to calculate the percentage deviation (Dperc) from the real value (Joram et al., 2005). Using data from 615 students (5th and 6th grade) from a written estimation test for length, area, capacity and volume, disadvantages of Dperc were observed: The scale is closed to underestimations, which causes high skewness and high number of outliers (for overestimations). Internal consistency and discrimination power is rather low. Therefore, two alternatives were investigated: Dividing by the smaller value (estimated or real value, Dmin) proposed by Lörcher (2000), and logarithmic error score (Dlog), adapted from Clayton (1996).	en
dc.identifier.uri	http://hdl.handle.net/2003/41969
dc.identifier.uri	http://dx.doi.org/10.17877/DE290R-23806
dc.language.iso	en	de
dc.publisher	Gesellschaft für Didaktik der Mathematik
dc.relation.ispartof	Beiträge zum Mathematikunterricht 2022
dc.subject	Schätzen	de
dc.subject	Größen	de
dc.subject	Leistungsbewertung	de
dc.subject	Testentwicklung	de
dc.subject.ddc	510
dc.title	Measurement Estimation Accuracy: A Comparison of Different Approaches	en
dc.type	Text	de
dc.type.publicationtype	ConferencePaper	de
dcterms.accessRights	open access
eldorado.secondarypublication	false	de

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