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What's Wrong with Hit Ratio?

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1 Author(s)
Ben-David, A. ; Holon Inst. of Technol.

When reporting classifier accuracy, it's common to use hit ratio as a primary metric. However, hit ratio has a serious flaw. We examine the issues surrounding this flaw and explore its magnitude through an empirical experiment on three multivalued classification data sets, using two well-known machine learning models. The results demonstrate a real problem that we can't simply overlook, and we propose an alternative-Cohen's kappa. Like any other metric, it has its own shortcomings, but we believe it should be mandatory in any scientific report about classifier accuracy

Published in:

Intelligent Systems, IEEE  (Volume:21 ,  Issue: 6 )

Date of Publication:

Nov.-Dec. 2006

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