Visual classes and natural categories in the pigeon.

  • John Cerella
  • Published 1979 in
    Journal of experimental psychology. Human…

Abstract

After being trained on an oak leaf pattern, pigeons responded to other oak leaf patterns but not to leaf patterns of other species. Thus, graphic variation among the instances of a species is "transparent" to the visual system. At this taxonomic level, concept formation is spontaneous rather than inductive. It is argued that such immediate generalization… (More)

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