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A comparison of two observed-score equating methods that assume equally reliable, congeneric tests
MacCann, Robert G. (1989)
 

Title 
A comparison of two observed-score equating methods that assume equally reliable, congeneric tests

Author(s)

Issue Date
1989

Type
Article

Abstract
For the external-anchor test equating model, two observed-score methods are derived using the slope and intercept assumptions of univariate selection theory and the assumptions that the tests to be equated are congeneric and equally reliable. The first derivation, Method 1, is then shown to give the same set of equations as Levine’s equations for random groups and unequally reliable tests and the "Z predicting X and Y" method. The second derivation, Method 2, is shown to give the same equations as Potthoff’s (1966) Method B and the "X and Y predicting Z" method. Methods 1 and 2 are compared empirically with Tucker’s and Levine’s equations for equally reliable tests; the conditions for which they may be appropriately applied are discussed. Index terms: Angoff’s Design V equations, congeneric tests, equally reliable tests, Levine’s equations (equally reliable), linear equating, observed-score equating, test equating, Tucker’s equations.

Appears in Collection(s)

Other Identifier(s)
other: doi:10.1177/014662168901300306

Suggested Citation
MacCann, Robert G.. (1989). A comparison of two observed-score equating methods that assume equally reliable, congeneric tests. Retrieved from the University of Minnesota Digital Conservancy, http://purl.umn.edu/107496.


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