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ERIC Number: EJ945270
Record Type: Journal
Publication Date: 2011-Sep
Pages: 13
Abstractor: As Provided
Reference Count: 38
ISSN: ISSN-1082-989X
Choosing the Number of Clusters in K-Means Clustering
Steinley, Douglas; Brusco, Michael J.
Psychological Methods, v16 n3 p285-297 Sep 2011
Steinley (2007) provided a lower bound for the sum-of-squares error criterion function used in K-means clustering. In this article, on the basis of the lower bound, the authors propose a method to distinguish between 1 cluster (i.e., a single distribution) versus more than 1 cluster. Additionally, conditional on indicating there are multiple clusters, the procedure is extended to determine the number of clusters. Through a series of simulations, the proposed methodology is shown to outperform several other commonly used procedures for determining both the presence of clusters and their number. (Contains 3 figures, 4 tables and 5 footnotes.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A