Chimpanzees trust conspecifics to engage in low-cost reciprocity

Food sharing is linked to urinary oxytocin levels and bonding in related and unrelated wild chimpanzees

(2014) R. M. Wittig et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Urinary oxytocin and social bonding in related and unrelated wild chimpanzees

(2013) C. Crockford et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Mechanisms of reciprocity in primates: testing for short-term contingency of grooming and food sharing in bonobos and chimpanzees

(2012) Adrian V. Jaeggi et al.   EVOLUTION AND HUMAN BEHAVIOR

Direct and indirect reputation formation in nonhuman great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, Pongo pygmaeus) and human children (Homo sapiens).

(2012) Esther Herrmann et al.   JOURNAL OF COMPARATIVE PSYCHOLOGY

Reciprocity and trades in wild West African chimpanzees

(2011) Cristina M. Gomes et al.   BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY

Consolation as possible expression of sympathetic concern among chimpanzees

(2010) T. Romero et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Testing the social dog hypothesis: Are dogs also more skilled than chimpanzees in non-communicative social tasks?

(2009) Victoria Wobber et al.   BEHAVIOURAL PROCESSES

Do chimpanzees learn reputation by observation? Evidence from direct and indirect experience with generous and selfish strangers

(2008) Francys Subiaul et al.   ANIMAL COGNITION

Long-term reciprocation of grooming in wild West African chimpanzees

(2008) C. M Gomes et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Image scoring in great apes

(2007) Yvan I. Russell et al.   BEHAVIOURAL PROCESSES