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REPLICATING CLUSTER-ANALYSIS - METHOD, CONSISTENCY, AND VALIDITY
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DOI：10.1207/s15327906mbr2402_1.png)
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To replicate a cluster analysis, clusters must first be described in terms of an objective classification rule. The effectiveness of three rules (nearest neighbor classification, nearest centroid assignment, and quadratic discriminant analysis) for replicating Ward''s salgorithm (Ward, 1963) is evaluated by Monte Carlo study. Consistent replication links cluster and their replicas identically over alternative cross-validation sequences (i.e., A replicates B, B replicates A) and is associated with recovery known clusters. Replication using nearest neighbor classification results in superior goodness-of-fit, more frequent consistent replication, and significant prediction of recovery. Although moderate or greater replication denotes good recovery, replication is not a necessary condition of recovery of true clusters.
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