External analyses of preference models

Mark L. Davison

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Using Carroll's external analysis, several studies have found that unfolding models account for more, although seldom significantly more, variance in preferences than Tucker's vector model. In studies of sociometric ratings and political preferences, the unfolding model again rarely outpredicted the vector model by a significant amount. Yet on cross-validation, the unfolding model consistently accounted for more variance. Results suggest that sometimes significance tests are less sensitive than cross-validation procedures to the small but consistent superiority of the unfolding model. Future researchers may wish to use significance tests and cross-validation techniques in comparing models.

Original languageEnglish (US)
Pages (from-to)557-558
Number of pages2
Issue number4
StatePublished - Dec 1976
Externally publishedYes


  • cross-validation
  • multiple regression
  • political preferences
  • sociometric choice
  • utility theory


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