Equidiscrimination contours around an achromatic colour are convex but not balanced

A.D. Logvinenko, M. Sawey, Y.N. Tyurin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A model based on the postreceptor channels followed by a Minkowski norm (Minkowski model) is widely used to fit experimental data on colour discrimination. This model predicts that contours of equal discrimination in colour space are convex and balanced (symmetrical). We have tested these predictions in an experiment. Two new statistical tests have been developed to analyse convexity and balancedness of experimental curves. Using these tests we have found that while they are in line with the convexity prediction, our experimental contours strongly testify against balancedness. It follows that the Minkowski model is, generally, inappropriate to model colour discrimination data.
Original languageEnglish
Pages (from-to)486-509
Number of pages24
JournalJournal of Mathematical Psychology
Issue number4
Publication statusPublished - 01 Aug 2002

ASJC Scopus subject areas

  • Applied Mathematics
  • Experimental and Cognitive Psychology

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