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  Author Title Year Publication Serial Volume Pages Links
Neuringer, A. Reinforced variability in animals and people: implications for adaptive action 2004 The American Psychologist 4106 59 891-906 details   doi
Markman, E.M.; Abelev, M. Word learning in dogs? 2004 Trends in Cognitive Sciences 274 8 479-81; discussion 481 details   doi
Bering, J.M. A critical review of the “enculturation hypothesis”: the effects of human rearing on great ape social cognition 2004 Animal Cognition 2543 7 201-212 details   doi
Hunt, G.R.; Gray, R.D. Direct observations of pandanus-tool manufacture and use by a New Caledonian crow (Corvus moneduloides) 2004 Animal Cognition 2529 7 114-120 details   doi
Uller, C. Disposition to recognize goals in infant chimpanzees 2004 Animal Cognition 2546 7 154-161 details   doi
Zentall, T.R. Action imitation in birds 2004 Learning & behavior : a Psychonomic Society publication 230 32 15-23 details   openurl
Zentall, T.R.; Weaver, J.E.; Clement, T.S. Pigeons group time intervals according to their relative duration 2004 Psychonomic bulletin & review 231 11 113-117 details   openurl
Friedrich, A.M.; Zentall, T.R. Pigeons shift their preference toward locations of food that take more effort to obtain 2004 Behavioural processes 227 67 405-415 details   doi
Friedrich, A.M.; Clement, T.S.; Zentall, T.R. Functional equivalence in pigeons involving a four-member class 2004 Behavioural processes 228 67 395-403 details   doi
Zentall, T.R.; Klein, E.D.; Singer, R.A. Evidence for detection of one duration sample and default responding to other duration samples by pigeons may result from an artifact of retention-test ambiguity 2004 Journal of experimental psychology. Animal behavior processes 232 30 129-134 details   doi
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