, Volume 51, Issue 3, pp 429–451

Extended similarity trees


  • James E. Corter
    • Teachers CollegeColumbia University
  • Amos Tversky
    • Stanford University

DOI: 10.1007/BF02294065

Cite this article as:
Corter, J.E. & Tversky, A. Psychometrika (1986) 51: 429. doi:10.1007/BF02294065


Proximity data can be represented by an extended tree, which generalizes traditional trees by including marked segments that correspond to overlapping clusters. An extended tree is a graphical representation of the distinctive features model. A computer program (EXTREE) that constructs extended trees is described and applied to several sets of conceptual and perceptual proximity data.

Key words

proximitiesnonhierarchical clusteringadditive treesfeature models
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© The Psychometric Society 1986