How do you measure pleasure? A discussion about intrinsic costs and benefits in primate allogrooming

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Rupert Ormond, J. R. Krebs, Nigel Davies · Journal of Animal Ecology · 1983 · 2.9K citations

Life Sciences, Biology, Evolutionary Biology +17

Contingent Negative Variation : An Electric Sign of Sensori-Motor Association and Expectancy in the Human Brain

W. Grey Walter, R. Cooper, V.J. Aldridge et al. · Nature · 1964 · 2.5K citations

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Francis Fukuyama, Robert Axelrod, Robert Jervis · Foreign Affairs · 1998 · 2.2K citations

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The Behaviour of Free-living Chimpanzees in the Gombe Stream Reserve

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Life Sciences, Biology, Zoology +12

Social Bonds of Female Baboons Enhance Infant Survival

Joan B. Silk, Susan C. Alberts, Jeanne Altmann · Science · 2003 · 1.2K citations

Life Sciences, Behavioral Sciences, Biology +17