The search for subtypes of DCD: Is cluster analysis the answer?

Studies using cluster analysis as a method to identify distinct subtypes of developmental coordination disorder (DCD) have been inconclusive leading s ome authors to conclude that the method of cluster analysis should be aband oned while others call for the validation of previously defined subtypes. T he objective of the current study was to examine the use of cluster analysi s as a method of searching for subtypes of DCD to gain a better understandi ng of how different samples and different measures influence the interpreta tion of results. The paper provides a detailed review of three commonly cit ed cluster analytical studies and then explores the possible reasons for th e discrepant results by replicating the approach with a different clinical sample. The results highlight the impact of different measures on cluster s tructure and the importance of adoption of a common standard to facilitate interpretation across studies. (C) 2001 Elsevier Science B.V. All rights re served.