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ERIC Number: EJ796572
Record Type: Journal
Publication Date: 2008-Jun
Pages: 14
Abstractor: Author
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0033-3123
Reducing Measurement Error in Student Achievement Estimation
Battauz, Michela; Bellio, Ruggero; Gori, Enrico
Psychometrika, v73 n2 p289-302 Jun 2008
The achievement level is a variable measured with error, that can be estimated by means of the Rasch model. Teacher grades also measure the achievement level but they are expressed on a different scale. This paper proposes a method for combining these two scores to obtain a synthetic measure of the achievement level based on the theory developed for regression with covariate measurement error. In particular, the focus is on ordinal scaled grades, using the SIMEX method for measurement error correction. The result is a measure comparable across subjects with smaller measurement error variance. An empirical application illustrates the method.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A