Date: Tue, 20 Sep 2005 17:15:58 -0500
Reply-To: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Swank, Paul R" <Paul.R.Swank@uth.tmc.edu>
Subject: Re: sample size for cluster analysis
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One issue is the degree of correlation among the variables. Typical
distance measures assume uncorrealted variables as do many of the
hierarchical criteria for determining the number of clusters. You may be
better off with fewer variables if they are uncorrelated.
Paul R. Swank, Ph.D.
Professor, Developmental Pediatrics
Director of Research, Center for Improving the Readiness of Children for
Learning and Education (C.I.R.C.L.E.)
UT Health Science Center at Houston
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Sent: Tuesday, September 20, 2005 2:02 PM
Subject: sample size for cluster analysis
I am running a cluster analysis with 20 variables in a sample of 100
participants. Is the sample size too small? Should I try to reduce the
number of variables? This is my first time running cluster analysis. Any
help would be greatly appreciated! Thank you!!