Published in Primates on April 24, 2014
Chimpanzees are indifferent to the welfare of unrelated group members. Nature (2005) 4.57
Cooperation between non-kin in animal societies. Nature (2009) 4.57
Conclusions beyond support: overconfident estimates in mixed models. Behav Ecol (2008) 4.26
Chimpanzees recruit the best collaborators. Science (2006) 3.73
What's in it for me? Self-regard precludes altruism and spite in chimpanzees. Proc Biol Sci (2006) 3.15
Give unto others: genetically unrelated cotton-top tamarin monkeys preferentially give food to those who altruistically give food back. Proc Biol Sci (2003) 2.77
Why be nice? Psychological constraints on the evolution of cooperation. Trends Cogn Sci (2004) 2.67
Cryptic multiple hypotheses testing in linear models: overestimated effect sizes and the winner's curse. Behav Ecol Sociobiol (2010) 2.34
Other-regarding preferences in a non-human primate: common marmosets provision food altruistically. Proc Natl Acad Sci U S A (2007) 2.33
Fission-fusion dynamics, behavioral flexibility, and inhibitory control in primates. Curr Biol (2008) 2.03
Summation and numerousness judgments of sequentially presented sets of items by chimpanzees (Pan troglodytes). J Comp Psychol (2001) 1.82
Long-term reciprocation of grooming in wild West African chimpanzees. Proc Biol Sci (2009) 1.74
Capuchin monkeys are sensitive to others' welfare. Curr Biol (2008) 1.66
A proximate perspective on reciprocal altruism. Hum Nat (2002) 1.65
Grooming reciprocation among female primates: a meta-analysis. Biol Lett (2008) 1.50
Estimating and operating on discrete quantities in orangutans (Pongo pygmaeus). J Comp Psychol (2000) 1.40
Cognitive consequences of cooperative breeding in primates? Anim Cogn (2009) 1.39
Chimpanzees (Pan troglodytes) do not develop contingent reciprocity in an experimental task. Anim Cogn (2009) 1.38
Food and token quantity discrimination in capuchin monkeys (Cebus apella). Anim Cogn (2007) 1.37
Contingent cooperation between wild female baboons. Proc Natl Acad Sci U S A (2010) 1.33
The relative roles of kinship and reciprocity in explaining primate altruism. Ecol Lett (2009) 1.25
Token transfers among great apes (Gorilla gorilla, Pongo pygmaeus, Pan paniscus, and Pan troglodytes): species differences, gestural requests, and reciprocal exchange. J Comp Psychol (2009) 1.25
Cooperative problem solving by tufted capuchin monkeys (Cebus apella): spontaneous division of labor, communication, and reciprocal altruism. J Comp Psychol (2005) 1.23
Donor payoffs and other-regarding preferences in cotton-top tamarins (Saguinus oedipus). Anim Cogn (2010) 1.17
Bonobos share with strangers. PLoS One (2013) 1.13
Calculated reciprocity after all: computation behind token transfers in orang-utans. Biol Lett (2008) 1.10
Do chimpanzees (Pan troglodytes) spontaneously take turns in a reciprocal cooperation task? J Comp Psychol (2009) 1.10
The ecological rationality of delay tolerance: insights from capuchin monkeys. Cognition (2010) 1.06
Reciprocity explains food sharing in humans and other primates independent of kin selection and tolerated scrounging: a phylogenetic meta-analysis. Proc Biol Sci (2013) 1.02
Chimpanzees share food for many reasons: the role of kinship, reciprocity, social bonds and harassment on food transfers. Anim Behav (2013) 1.02
Chimpanzees do not take advantage of very low cost opportunities to deliver food to unrelated group members. Anim Behav (2008) 0.98
Monkeys and apes: are their cognitive skills really so different? Am J Phys Anthropol (2010) 0.97
Food transfers in capuchin monkeys: an experiment on partner choice. Biol Lett (2012) 0.94
Cognitive research in zoo-housed chimpanzees: influence of personality and impact on welfare. Am J Primatol (2012) 0.92
Grooming in mandrills and the time frame of reciprocal partner choice. Am J Primatol (2009) 0.85
Using behavioral observations and keeper questionnaires to assess social relationships among captive female African elephants. Zoo Biol (2010) 0.77
Understanding and sharing intentions: the origins of cultural cognition. Behav Brain Sci (2005) 9.46
Humans have evolved specialized skills of social cognition: the cultural intelligence hypothesis. Science (2007) 4.55
Chimpanzees are rational maximizers in an ultimatum game. Science (2007) 3.56
Ratcheting up the ratchet: on the evolution of cumulative culture. Philos Trans R Soc Lond B Biol Sci (2009) 3.44
What's in it for me? Self-regard precludes altruism and spite in chimpanzees. Proc Biol Sci (2006) 3.15
Word learning in a domestic dog: evidence for "fast mapping". Science (2004) 3.02
Apes save tools for future use. Science (2006) 2.88
Do chimpanzees know what conspecifics know? Anim Behav (2001) 2.70
Evidence for cultural differences between neighboring chimpanzee communities. Curr Biol (2012) 2.37
Making inferences about the location of hidden food: social dog, causal ape. J Comp Psychol (2006) 2.18
Wild chimpanzees inform ignorant group members of danger. Curr Biol (2011) 2.09
Fission-fusion dynamics, behavioral flexibility, and inhibitory control in primates. Curr Biol (2008) 2.03
Chimpanzees understand psychological states - the question is which ones and to what extent. Trends Cogn Sci (2003) 1.80
Chimpanzees are vengeful but not spiteful. Proc Natl Acad Sci U S A (2007) 1.80
Discrete quantity judgments in the great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, Pongo pygmaeus): the effect of presenting whole sets versus item-by-item. J Comp Psychol (2007) 1.78
Stress reduction through consolation in chimpanzees. Proc Natl Acad Sci U S A (2008) 1.78
Unwilling versus unable: infants' understanding of intentional action. Dev Psychol (2005) 1.75
Long-term reciprocation of grooming in wild West African chimpanzees. Proc Biol Sci (2009) 1.74
Are apes really inequity averse? Proc Biol Sci (2006) 1.68
All great ape species follow gaze to distant locations and around barriers. J Comp Psychol (2005) 1.59
Domestic dogs comprehend human communication with iconic signs. Dev Sci (2009) 1.52
Gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) encode relevant problem features in a tool-using task. J Comp Psychol (2005) 1.51
Grooming reciprocation among female primates: a meta-analysis. Biol Lett (2008) 1.50
Use of gesture sequences in chimpanzees. Am J Primatol (2004) 1.50
Assessing the validity of ape-human comparisons: a reply to Boesch (2007). J Comp Psychol (2008) 1.48
Enculturated chimpanzees imitate rationally. Dev Sci (2007) 1.47
Evidence for emulation in chimpanzees in social settings using the floating peanut task. PLoS One (2010) 1.46
Chimpanzees know what others know, but not what they believe. Cognition (2008) 1.46
How does cognition evolve? Phylogenetic comparative psychology. Anim Cogn (2011) 1.45
Understanding "prior intentions" enables two-year-olds to imitatively learn a complex task. Child Dev (2002) 1.42
Are apes inequity averse? New data on the token-exchange paradigm. Am J Primatol (2009) 1.42
Reliance on head versus eyes in the gaze following of great apes and human infants: the cooperative eye hypothesis. J Hum Evol (2006) 1.41
Chimpanzees help conspecifics obtain food and non-food items. Proc Biol Sci (2010) 1.40
Chimpanzees (Pan troglodytes) conceal visual and auditory information from others. J Comp Psychol (2006) 1.39
Twelve- and 18-month-olds copy actions in terms of goals. Dev Sci (2005) 1.38
Design complexity in termite-fishing tools of chimpanzees (Pan troglodytes). Biol Lett (2009) 1.35
Contingent cooperation between wild female baboons. Proc Natl Acad Sci U S A (2010) 1.33
Mothers matter! Maternal support, dominance status and mating success in male bonobos (Pan paniscus). Proc Biol Sci (2010) 1.33
Chimpanzees deceive a human competitor by hiding. Cognition (2006) 1.32
Body orientation and face orientation: two factors controlling apes' behavior from humans. Anim Cogn (2004) 1.31
Chimpanzees solve the trap problem when the confound of tool-use is removed. J Exp Psychol Anim Behav Process (2009) 1.31
Differences in the cognitive skills of bonobos and chimpanzees. PLoS One (2010) 1.29
How great apes perform on a modified trap-tube task. Anim Cogn (2006) 1.28
Great apes' (Pan troglodytes, Pan paniscus, Gorilla gorilla, Pongo pygmaeus) understanding of tool functional properties after limited experience. J Comp Psychol (2008) 1.27
Importance of achromatic contrast in short-range fruit foraging of primates. PLoS One (2008) 1.26
The relative roles of kinship and reciprocity in explaining primate altruism. Ecol Lett (2009) 1.25
Token transfers among great apes (Gorilla gorilla, Pongo pygmaeus, Pan paniscus, and Pan troglodytes): species differences, gestural requests, and reciprocal exchange. J Comp Psychol (2009) 1.25
Why are bystanders friendly to recipients of aggression? Commun Integr Biol (2009) 1.18
Chimpanzees really know what others can see in a competitive situation. Anim Cogn (2007) 1.17
Raising the level: orangutans use water as a tool. Biol Lett (2007) 1.17
Comparing the performances of apes (Gorilla gorilla, Pan troglodytes, Pongo pygmaeus) and human children (Homo sapiens) in the floating peanut task. PLoS One (2011) 1.15
Behavioral and emotional response of Japanese macaque (Macaca fuscata) mothers after their offspring receive an aggression. J Comp Psychol (2004) 1.15
Reconciliation, consolation and postconflict behavioral specificity in chimpanzees. Am J Primatol (2008) 1.14
Cognitive cladistics and cultural override in Hominid spatial cognition. Proc Natl Acad Sci U S A (2006) 1.14
Chimpanzee 'folk physics': bringing failures into focus. Philos Trans R Soc Lond B Biol Sci (2012) 1.13
How the great apes (Pan troglodytes, Pongo pygmaeus, Pan paniscus, and Gorilla gorilla) perform on the reversed contingency task: the effects of food quantity and food visibility. J Exp Psychol Anim Behav Process (2006) 1.12
The structure of individual differences in the cognitive abilities of children and chimpanzees. Psychol Sci (2009) 1.12
Reaching around barriers: the performance of the great apes and 3-5-year-old children. Anim Cogn (2009) 1.11
Theft in an ultimatum game: chimpanzees and bonobos are insensitive to unfairness. Biol Lett (2012) 1.10
Great apes' risk-taking strategies in a decision making task. PLoS One (2011) 1.09
Tubes, tables and traps: great apes solve two functionally equivalent trap tasks but show no evidence of transfer across tasks. Anim Cogn (2008) 1.09
No third-party punishment in chimpanzees. Proc Natl Acad Sci U S A (2012) 1.09
Keeping track of time: evidence for episodic-like memory in great apes. Anim Cogn (2009) 1.08
An experimental study of nettle feeding in captive gorillas. Am J Primatol (2008) 1.08
Tracking the displacement of objects: a series of tasks with great apes (Pan troglodytes, Pan paniscus, Gorilla gorilla, and Pongo pygmaeus) and young children (Homo sapiens). J Exp Psychol Anim Behav Process (2006) 1.07
Chimpanzees know that others make inferences. Proc Natl Acad Sci U S A (2011) 1.06
Color-vision polymorphism in wild capuchins (Cebus capucinus) and spider monkeys (Ateles geoffroyi) in Costa Rica. Am J Primatol (2005) 1.06
Intragroup lethal aggression in wild spider monkeys. Am J Primatol (2006) 1.05
Chimpanzee responders still behave like rational maximizers. Proc Natl Acad Sci U S A (2013) 1.04
Neighbouring chimpanzee communities show different preferences in social grooming behaviour. Proc Biol Sci (2012) 1.04
The impact of paternity on male-infant association in a primate with low paternity certainty. Mol Ecol (2013) 1.03
An explicit signature of balancing selection for color-vision variation in new world monkeys. Mol Biol Evol (2009) 1.03
Patterns of interventions and the effect of coalitions and sociality on male fitness. Mol Ecol (2011) 1.03
Chimpanzees (Pan troglodytes) flexibly adjust their behaviour in order to maximize payoffs, not to conform to majorities. PLoS One (2013) 1.02
Reciprocity of support in coatis (Nasua nasua). J Comp Psychol (2008) 1.01
What do bonobos (Pan paniscus) understand about physical contact? J Comp Psychol (2006) 1.01
How the great apes (Pan troglodytes, Pongo pygmaeus, Pan paniscus, Gorilla gorilla) perform on the reversed reward contingency task II: transfer to new quantities, long-term retention, and the impact of quantity ratios. J Comp Psychol (2008) 1.01
Memory for distant past events in chimpanzees and orangutans. Curr Biol (2013) 1.01
Imitation recognition in great apes. Curr Biol (2008) 1.00
Are there geniuses among the apes? Philos Trans R Soc Lond B Biol Sci (2012) 0.99
Rational tool use and tool choice in human infants and great apes. Child Dev (2008) 0.99
Chimpanzee problem-solving: contrasting the use of causal and arbitrary cues. Anim Cogn (2011) 0.98
Grooming network cohesion and the role of individuals in a captive chimpanzee group. Am J Primatol (2010) 0.98
The use of experimenter-given cues by South African fur seals (Arctocephalus pusillus). Anim Cogn (2004) 0.98
The performance of bonobos (Pan paniscus), chimpanzees (Pan troglodytes), and orangutans (Pongo pygmaeus) in two versions of an object-choice task. J Comp Psychol (2009) 0.97
Image scoring in great apes. Behav Processes (2007) 0.97
Monkeys and apes: are their cognitive skills really so different? Am J Phys Anthropol (2010) 0.97
Problem solving in great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, and Pongo abelii): the effect of visual feedback. Anim Cogn (2012) 0.95
New evidence for self-medication in bonobos: Manniophyton fulvum leaf- and stemstrip-swallowing from LuiKotale, Salonga National Park, DR Congo. Am J Primatol (2013) 0.95
You mate, I mate: macaque females synchronize sex not cycles. PLoS One (2011) 0.94
Great apes' understanding of other individuals' line of sight. Psychol Sci (2007) 0.94
The role of humans in the cognitive development of apes revisited. Anim Cogn (2004) 0.94
Traditions in spider monkeys are biased towards the social domain. PLoS One (2011) 0.93
Untrained chimpanzees (Pan troglodytes schweinfurthii) fail to imitate novel actions. PLoS One (2012) 0.93
Relative quantity judgments in South American sea lions (Otaria flavescens). Anim Cogn (2011) 0.93
Mangabeys (Cercocebus torquatus lunulatus) solve the reverse contingency task without a modified procedure. Anim Cogn (2007) 0.93
Methodological challenges in the study of primate cognition. Science (2011) 0.93