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Biometrika 1975 62(3):665-672; doi:10.1093/biomet/62.3.665
© 1975 by Biometrika Trust
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A comparison of different criteria for selecting binary tests in diagnostic keys

J. C. GOWER and R. W. PAYNE

Rothamsted Experimental Station, Harpenden, Hertfordshire

The problem of selecting tests to be used in nonprobabilistic binary diagnostic keys is discussed. Five selection criteria are compared and it is shown that all except a new criterion suffer from some deficiency. This criterion cannot be extended easily to cope with multi-response tests but another criterion, which behaves satisfactorily with binary tests, can be extended in some circumstances. The only criterion which can always be used with multi-response tests is least satisfactory for binary tests.

Key Words: Diagnostic keys • Error rates • Test selection


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