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  Author Title Year Publication Serial Volume (up) Pages Links
Rumbaugh, D.M.; Savage-Rumbaugh, S.; Hegel, M.T. Summation in the chimpanzee (Pan troglodytes) 1987 Journal of Experimental Psychology. Animal Behavior Processes 2785 13 107-115 details   openurl
Zentall, T.R.; Sherburne, L.M. Role of differential sample responding in the differential outcomes effect involving delayed matching by pigeons 1994 Journal of experimental psychology. Animal behavior processes 257 20 390-401 details   openurl
Boysen, S.T.; Berntson, G.G. Responses to quantity: perceptual versus cognitive mechanisms in chimpanzees (Pan troglodytes) 1995 Journal of Experimental Psychology. Animal Behavior Processes 2783 21 82-86 details   openurl
Zentall, T.R.; Kaiser, D.H.; Clement, T.S.; Weaver, J.E.; Campbell, G. Presence/absence-sample matching by pigeons: divergent retention functions may result from the similarity of behavior during the absence sample and the retention interval 2000 Journal of experimental psychology. Animal behavior processes 247 26 294-304 details   openurl
Fagot, J.; Wasserman, E.A.; Young, M.E. Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens) 2001 Journal of Experimental Psychology. Animal Behavior Processes 2772 27 316-328 details   openurl
Cerutti, D.T.; Staddon, J.E.R. Immediacy versus anticipated delay in the time-left experiment: a test of the cognitive hypothesis 2004 Journal of Experimental Psychology. Animal Behavior Processes 2768 30 45-57 details   doi
Gibson, B.M.; Shettleworth, S.J. Competition among spatial cues in a naturalistic food-carrying task 2003 Learning & behavior : a Psychonomic Society publication 368 31 143-159 details   openurl
Brosnan, S.F.; de Waal, F.B.M. Responses to a simple barter task in chimpanzees, Pan troglodytes 2005 Primates 167 46 173-182 details   doi
Neuringer, A. Reinforced variability in animals and people: implications for adaptive action 2004 The American Psychologist 4106 59 891-906 details   doi
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
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