Results Analysis - Tree | Dendrogram
A Dendrogram is used to illustrate the arrangement of the clusters produced by a average link cluster analysis.
The tree should be read left to right - as strong to weak clusters. Hovering over any cluster circle will show you the strength of that cluster as a percentage. 100% meaning all participants grouped those cards together. 50% meaning half of the participants placed those cards in the same group.
The average link cluster algorithm finds a set of cards( two or more ) with the highest similarity score/percentage. It then forms a cluster and replaces the items in the set with the cluster. The process is then repeated. When a cluster is analyzed against another card or cluster, the average of the similarity scores between all members is used.