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ERIC Number: EJ1111319
Record Type: Journal
Publication Date: 2008-Apr
Pages: 29
Abstractor: As Provided
ISSN: EISSN-2330-8516
Theoretical and Empirical Standard Errors for Two Population Invariance Measures in the Linear Equating Case. Research Report. ETS RR-08-24
von Davier, Alina A.; Manalo, Jonathan R.; Rijmen, Frank
ETS Research Report Series, Apr 2008
The standard errors of the 2 most widely used population-invariance measures of equating functions, root mean square difference (RMSD) and root expected mean square difference (REMSD), are not derived for common equating methods such as linear equating. Consequently, it is unknown how much noise is contained in these estimates. This paper describes 2 methods for obtaining the standard errors for RMSD and REMSD. The delta method relies on an analytical approximation and provides asymptotic standard errors. The grouped jackknife method is a sampling-based method. Both methods were applied to a real data application. The results showed that there was very little difference between the standard errors found by the 2 methods.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A