Delaying gratification for food and tokens in capuchin monkeys (Cebus apella) and chimpanzees (Pan troglodytes): when quantity is salient, symbolic stimuli do not improve performance
2015 ◽
Vol 129
(2)
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pp. 160-173
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Keyword(s):
2009 ◽
Vol 159
(3)
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pp. 1119-1125
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Keyword(s):
2014 ◽
Vol 128
(4)
◽
pp. 402-413
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Keyword(s):
1995 ◽
Vol 109
(1)
◽
pp. 52-60
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