Understanding chimpanzee facial expression: insights into the evolution of communication.

To understand the evolution of emotional communication, comparative research on facial expression similarities between humans and related species is essential. Chimpanzees display a complex, flexible facial expression repertoire with many physical and functional similarities to humans. This paper reviews what is known about these facial expression repertoires, discusses the importance of social organization in understanding the meaning of different expressions, and introduces a new coding system, the ChimpFACS, and describes how it can be used to determine homologies between human and chimpanzee facial expressions. Finally, it reviews previous studies on the categorization of facial expressions by chimpanzees using computerized tasks, and discusses the importance of configural processing for this skill in both humans and chimpanzees. Future directions for understanding the evolution of emotional communication will include studies on the social function of facial expressions in ongoing social interactions, the development of facial expression communication and more studies that examine the perception of these important social signals.

[1]  N. Tinbergen.  On aims and methods of Ethology , 2010 .

[2]  K. Bard,et al.  A Cross-species Comparison of Facial Morphology and Movement in Humans and Chimpanzees Using the Facial Action Coding System (FACS) , 2007, Journal of nonverbal behavior.

[3]  K. Bard,et al.  Classifying chimpanzee facial expressions using muscle action. , 2007, Emotion.

[4]  L. Parr,et al.  The Perception of Unfamiliar Faces and Houses by Chimpanzees: Influence of Rotation Angle , 2006, Perception.

[5]  L. Parr,et al.  Three studies on configural face processing by chimpanzees , 2006, Brain and Cognition.

[6]  K. Bard,et al.  Intramuscular electrical stimulation of facial muscles in humans and chimpanzees: Duchenne revisited and extended. , 2006, Emotion.

[7]  L. Parr,et al.  Muscles of facial expression in the chimpanzee (Pan troglodytes): descriptive, comparative and phylogenetic contexts , 2006, Journal of anatomy.

[8]  Robin I. M. Dunbar,et al.  Differential Behavioural Effects of Silent Bared Teeth Display and Relaxed Open Mouth Display in Chimpanzees (Pan troglodytes) , 2005 .

[9]  L. Parr,et al.  Influence of Social Context on the Use of Blended and Graded Facial Displays in Chimpanzees , 2005, International Journal of Primatology.

[10]  K. Slocombe,et al.  Agonistic screams in wild chimpanzees (Pan troglodytes schweinfurthii) vary as a function of social role. , 2005, Journal of comparative psychology.

[11]  R. Gur,et al.  Differences in facial expressions of four universal emotions , 2004, Psychiatry Research.

[12]  Jennifer C. Britton,et al.  Neural correlates of individual ratings of emotional salience: a trial-related fMRI study , 2004, NeuroImage.

[13]  D. Maurer,et al.  The many faces of configural processing , 2002, Trends in Cognitive Sciences.

[14]  Charles D. Smith,et al.  Neural substrates of facial emotion processing using fMRI. , 2001, Brain research. Cognitive brain research.

[15]  J. E. Steiner,et al.  Comparative expression of hedonic impact: affective reactions to taste by human infants and other primates , 2001, Neuroscience & Biobehavioral Reviews.

[16]  J. Haxby,et al.  The distributed human neural system for face perception , 2000, Trends in Cognitive Sciences.

[17]  A. Young,et al.  Configural information in facial expression perception. , 2000, Journal of experimental psychology. Human perception and performance.

[18]  J. Winslow,et al.  Recognizing facial cues: individual discrimination by chimpanzees (Pan troglodytes) and rhesus monkeys (Macaca mulatta). , 2000, Journal of comparative psychology.

[19]  L. Parr,et al.  Visual kin recognition in chimpanzees , 1999, Nature.

[20]  P. Ekman.  Should we call it expression or communication , 1997 .

[21]  Julie Gros-Louis,et al.  Selection for acoustic individuality within the vocal repertoire of wild chimpanzees , 1996, International Journal of Primatology.

[22]  D. Glaser,et al.  Taste-induced facial expressions in apes and humans , 1995 .

[23]  A. J. Fridlund.  Human Facial Expression: An Evolutionary View , 1994 .

[24]  H. Wallbott,et al.  Decoders' processing of emotional facial expression — a top-down or bottom-up mechanism?† , 1993 .

[25]  John J. Magee,et al.  Categorical perception of facial expressions , 1992, Cognition.

[26]  P. Ekman,et al.  The Duchenne smile: emotional expression and brain physiology. II. , 1990, Journal of personality and social psychology.

[27]  P. Ekman,et al.  Felt, false, and miserable smiles , 1982 .

[28]  William J. Smith,et al.  The Behavior of Communicating: An Ethological Approach , 1980 .

[29]  Mario von Cranach,et al.  Methods of inference from animal to human behaviour : [proceedings] , 1978 .

[30]  R. Passingham.  Social communication and movement : M. Von Cranach and I. Vine (eds.): Academic Press, London, 1973. viii + 489 pp. £8.50 , 1975 .

[31]  C. Darwin,et al.  The Expression of the Emotions in Man and Animals , 1956 .

[32]  R. Robinson.  Address of the President Sir Robert Robinson, at the Anniversary Meeting, 30 November 1950 , 1951, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[33]  K. Bard,et al.  A Cross Species Comparison of Facial Morphology and Movement in Humans and Chimpanzees Using FACS , 2008 .

[34]  N. Bolwig.  Communicative signals and social behaviour of some African monkeys: A comparative study , 2006, Primates.

[35]  L. Parr,et al.  The evolution of human emotion , 2006 .

[36]  R. Gibson,et al.  What the Face Reveals , 2002 .

[37]  F. D. Waal,et al.  Infant chimpanzee and human child , 2002 .

[38]  L. Parr,et al.  The Perception of Facial Expressions By Chimpanzees, Pan Troglodytes , 1998 .

[39]  Aleix M. Martinez,et al.  The AR face database , 1998 .

[40]  Signe Preuschoft,et al.  The social function of "smile" and "laughter": Variations across primate species and societies. , 1997 .

[41]  J. Van Hooff,et al.  Homologizing primate facial displays: a critical review of methods. , 1995, Folia primatologica; international journal of primatology.

[42]  P. Ekman,et al.  Behavioral markers and recognizability of the smile of enjoyment. , 1993, Journal of personality and social psychology.

[43]  F. Waal,et al.  The Communicative Repertoire of Captive Bonobos (Pan Paniscus), Compared To That of Chimpanzees , 1988 .

[44]  R. Bakeman,et al.  Observing Interaction: An Introduction to Sequential Analysis , 1986 .

[45]  J. Goodall.  The Chimpanzees of Gombe: Patterns of Behavior , 1986 .

[46]  F. D. de Waal,et al.  The formal hierarchy of rhesus macaques: An investigation of the bared‐teeth display , 1985, American journal of primatology.

[47]  P. Ekman.  Emotion in the human face , 1982 .

[48]  R. Weigel.  The Facial Expressions of the Brown Capuchin Monkey (Ceb Us Apella) , 1979 .

[49]  R. Dawkins,et al.  Animal signals: information or manipulation? , 1978 .

[50]  P. Ekman,et al.  Facial Action Coding System: Manual , 1978 .

[51]  J. Krebs,et al.  Behavioural ecology: An evolutionary approach , 1978 .

[52]  William K. Redican,et al.  Facial Expressions in Nonhuman Primates , 1975 .

[53]  V. Hooff.  A comparative approach to the phylogeny of laughter and smiling. , 1972 .

[54]  M. Fox.  A Comparative Study of the Development of Facial Expressions in Canids; Wolf, Coyote and Foxes , 1970 .

[55]  Phyllis C. Jay,et al.  Primates: Studies in Adaptation and Variability , 1968 .

[56]  Van Hooff,et al.  The Facial Displays of the Catarrhine Monkeys and Apes. , 1967 .

[57]  N. Bolwig.  Facial Expression in Primates With Remarks On a Parallel Development in Certain Carnivores (a Preliminary Report On Work in Progress) , 1964 .

[58]  R. Andrew,et al.  The origin and evolution of the calls and facial expressions of the primates. , 1963 .

[59]  Leah Anne Keplinger.  The Expression of the Emotions in Man and Animals , 1957 .

[60]  S. Fernberger.  The Great Apes. , 1931 .

[61]  R. Yerkes,et al.  Chimpanzee intelligence and its vocal expressions , 1925 .