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On the Choice of Similarity Measures for Type-2 Fuzzy Sets

McCulloch, Josie; Wagner, Christian


Josie McCulloch


Similarity measures are among the most common methods of comparing type-2 fuzzy sets and have been used in numerous applications. However, deciding how to measure similarity and choosing which existing measure to use can be difficult. Whilst some measures give results that highly correlate with each other, others give considerably different results. We evaluate all of the current similarity measures on type-2 fuzzy sets to discover which measures have common properties of similarity and, for those that do not, we discuss why the properties are different, demonstrate whether and what effect this has in applications, and discuss how a measure can avoid missing a property that is required. We analyse existing measures in the context of computing with words using a comprehensive collection of data-driven fuzzy sets. Specifically, we highlight and demonstrate how each method performs at clustering words of similar meaning.


McCulloch, J., & Wagner, C. (2020). On the Choice of Similarity Measures for Type-2 Fuzzy Sets. Information Sciences, 510, 135-154.

Journal Article Type Article
Acceptance Date Sep 14, 2019
Online Publication Date Sep 14, 2019
Publication Date 2020-02
Deposit Date Sep 16, 2019
Publicly Available Date Sep 15, 2020
Journal Information Sciences
Print ISSN 0020-0255
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 510
Pages 135-154
Keywords Type-2 fuzzy sets; Similarity measures
Public URL
Publisher URL


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