Article Information
vol. 312 no. 5780 1662-1665
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History:
- Received for publication February 22, 2006
- Accepted for publication May 5, 2006
- .
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- Previous version (May 18, 2006 - 11:58).
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American Association for the Advancement of Science
Author Information
- 1 Sub-department of Animal Behavior, University of Cambridge, Cambridge, CB3 8AA, UK.
- 2 Department of Experimental Psychology, University of Cambridge, Cambridge, CB2 3EB, UK.
- ↵* To whom correspondence should be addressed. E-mail: nsc22{at}cam.ac.uk
