Geometric rule learning by Clark's nutcrackers (Nucifraga columbiana)

Alan C. Kamil, Juli E. Jones

Research output: Contribution to journalArticle

80 Scopus citations

Abstract

Clark's nutcrackers (Nucifraga columbiana) were trained to search in a location defined by its geometric relationship to 2 landmarks. Two groups were trained to search at different points along the line connecting the landmarks, and 2 groups were trained to find the 3rd point of a triangle, on the basis of either direction or distance from the landmarks. All groups learned and transferred to new interlandmark distances. However, the constant-distance group learned more slowly, searched less accurately, and showed less transfer than the other 3 groups. When tested with new orientations of the landmarks, the birds tended to follow small but not large rotations. When tested with a single landmark, birds in the half, quarter, and constant-bearing groups searched in the appropriate direction from the landmark, but birds in the distance group did not. These results demonstrate that nutcrackers can learn a variety of geometric principles, that directional information may be weighted more heavily than distance information, and that the birds can use both absolute and relative information about spatial relationships.

Original languageEnglish (US)
Pages (from-to)439-453
Number of pages15
JournalJournal of Experimental Psychology: Animal Behavior Processes
Volume26
Issue number4
DOIs
StatePublished - Oct 2000

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ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Experimental and Cognitive Psychology

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