The DOI matches its Crossref record; 64 of the 64 references it cites were found in a registry or an index.
Understanding chimpanzee facial expression: insights into the evolution of communication
Open accessAbstract
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.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
The cited source says what the claim attributes to it.
In the citing paper
“Humans' closest relatives in the animal kingdom, namely chimpanzees, have strikingly similar underlying mimetic musculature in their faces (Parr and Waller, 2006).”
From Connecting minds and sharing emotions through mimicry: A neurocognitive model of emotional contagion (2017) · cites this paper as Parr and Waller, 2006
The check wasn’t confident either way, so it gives no verdict — never disputed.
In the citing paper
“Aversive responses, including feelings of fear or anxiety, are modulated by hardwired neural circuits that share common neuroarchitectures among mammals (Le Doux, 2012;Parr and Waller, 2006).”
From Connecting minds and sharing emotions through mimicry: A neurocognitive model of emotional contagion (2017) · cites this paper as Parr and Waller, 2006
Experimental — accuracy not yet measured
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The expression of the emotions in man and animals.
Darwin, C. D. (1872) · J. Murray eBooks · doi:10.1037/10001-000 · Cited by 12,120
Ekman, P., & Friesen, W. V. (2019) · PsycTESTS Dataset · doi:10.1037/t27734-000 · Cited by 6,019
The distributed human neural system for face perception
Haxby, J. V., Hoffman, E. A., & Gobbini, M. I. (2000) · Trends in Cognitive Sciences · doi:10.1016/s1364-6613(00)01482-0 · Cited by 4,891
Behavioural Ecology: An Evolutionary Approach
Adams, J. M., Krebs, J. R., & Davies, N. B. (1992) · Journal of Animal Ecology · doi:10.2307/5530 · Cited by 3,919
Observing Interaction: An Introduction to Sequential Analysis
Willson, V. L., Bakeman, R. A., & Gottman, J. M. (1988) · Journal of Educational Statistics · doi:10.2307/1164658 · Cited by 2,301
The many faces of configural processing
Maurer, D. M., Grand, R. L., & Mondloch, C. J. (2002) · Trends in Cognitive Sciences · doi:10.1016/s1364-6613(02)01903-4 · Cited by 2,114
Behavioural ecology: An evolutionary approach
Pulliam, H. R. (1979) · Animal Behaviour · doi:10.1016/0003-3472(79)90082-4 · Cited by 2,001
Martı́nez, A. M. (1998) · Medical Entomology and Zoology · Cited by 1,982
(1972) · Elsevier eBooks · doi:10.1016/c2013-0-02458-9 · Cited by 1,463
Symposia of the Zoological Society of London
Saunders, G., White, P. C. L., Rayner, J. M. V., & Harris, S. (1993) · Cited by 1,402
Flagged first, then by citations
Research works printed but not linked: 9
- Ekman, 1978, Facial Action Coding System
- Goodall, 1968, A preliminary report on expressive movements and communication in the Gombe Stream chimpanzees, 313
- Parr, 2003, Nonvocal communication in nonhuman primates, 324
- Parr, 2002, Afterword: research on facial emotion in chimpanzees, 75 years since Kohts, 411
- Redican, 1982, An evolutionary perspective on human facial displays, 212
- Smith, 1977, The Behaviour of Communication. An Ethological Approach
- van Hooff, 1962, Facial expressions in higher primates, 97
- van Hooff, 1973, A structural analysis of the social behavior of a semi-captive groups of chimpanzees, 75
- Vick, A cross species comparison of facial morphology and movement in humans and chimpanzees using FACS, Journal of Nonverbal Behavior
Cited by
Sorted by citations
Items 101–160 of 160
A fear detection method based on palpebral fissure
Praditsangthong, R., Slakkham, B., & Bhattarakosol, P. (2019) · Journal of King Saud University - Computer and Information Sciences · doi:10.1016/j.jksuci.2019.06.001 · Cited by 3
Preference and discrimination of facial expressions of humans, rats, and mice by C57 mice
Watanabe, S., Masuda, S., Shinozuka, K., & Borlongan, C. V. (2021) · Animal Cognition · doi:10.1007/s10071-021-01551-y · Cited by 3
Hasson, C. (2011) · theses.fr (ABES) · doi:10.70675/8147f57dz1bcaz471dz9168ze3c68517a04a · Cited by 3
Facial Emotional Recognition Using Convolutional Neural Network
Raj, D., & Wassay, M. A. (2023) · International Conference for Innovation in Technology (INOCON) · doi:10.1109/inocon57975.2023.10101347 · Cited by 2
I’ve just seen a face: further search for face pareidolia in chimpanzees (Pan troglodytes)
Tomonaga, M. (2025) · Frontiers in Psychology · doi:10.3389/fpsyg.2024.1508867 · Cited by 2
Song, X., Gong, S., Quan, Z., Jiang, W., Zhi, J., Hao, Z., & Wu, H. (2025) · Cities · doi:10.1016/j.cities.2025.106469 · Cited by 1
van Boekholt, B., Bosshard, A. B., & Pika, S. (2025) · Proceedings of the Royal Society B Biological Sciences · doi:10.1098/rspb.2025.2271 · Cited by 1
Visual preference for previously familiar faces in Chimpanzees (Pan troglodytes)
Ode, A., Adachi, I., & Imura, T. (2026) · Scientific Reports · doi:10.1038/s41598-026-40862-3 · Cited by 1
Post-ludzki design twarzy – posthumanistyczne konteksty technologii obrazowania twarzy
Stasieńko, J. (2020) · Przegląd Kulturoznawczy · doi:10.4467/20843860pk.20.006.11934 · Cited by 1
A Study on Detection of Emotions with The Help of Convolutional Neural Network
Raj, D., Wassay, M. A., & Verma, K. (2022) · International Conference on Computational Modelling, Simulation and Optimization (ICCMSO) · doi:10.1109/iccmso58359.2022.00073 · Cited by 1
Automatic Facial Expression Recognition Employing CNN-Inception and the ResNet 50
Krishnakumari, K., Padmapriya, S., Abirami, N., Kanaghadhara, N. E., & Arul, P. (2023) · International Conference on Research Methodologies in Knowledge Management, Artificial Intelligence and Telecommunication Engineering (RMKMATE) · doi:10.1109/rmkmate59243.2023.10368811 · Cited by 1
Cauté, M., Chemla, E., & Schlenker, P. (2024) · PeerJ · doi:10.7717/peerj.16800 · Cited by 1
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0008 · Cited by 1
Sample Size and Generalizability
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0007 · Cited by 1
Priming using human and chimpanzee expressions of emotion biases attention toward positive emotions
Matsulevits, A., & Kret, M. E. (2025) · Cognition & Emotion · doi:10.1080/02699931.2025.2455600 · Cited by 1
Vocal-visual combinations in wild chimpanzeesPreprint
Mine, J. G., Wilke, C., Zulberti, C., Bejhati, M., Stoll, S., Machanda, Z. P., Manser, A., Slocombe, K. E., & Townsend, S. W. (2023) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2023.05.24.541909 · Cited by 1
Chimpanzee Personhood: Supporting Scientific Documentation
Balcombe, J. P. (2012) · WBI Studies Repository
Mukha Mo: A Preliminary Study on Filipino Facial Expressions
Taduran, R. J. O. (2012) · DOAJ (DOAJ: Directory of Open Access Journals)
Communication and cooperation in wild chimpanzees(Pan troglodytes schweinfurthii)
Wilke, C. (2016) · White Rose eTheses Online (University of Leeds, The University of Sheffield, University of York)
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0008
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0002
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0004 · Cited by 1
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0001
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0010
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0005
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0003
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0006
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0007
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.003.0009
Frings, S. (2021) · Springer eBooks · doi:10.1007/978-3-662-63233-8_2
The Psychology and Evolution of Foraging Skills in Primates
Rosati, A. G. (2012) · DukeSpace (Duke University)
Sauciuc, G.-A., Persson, T., & Madsen, E. A. (2021) · OSF Preprints (OSF Preprints) · doi:10.31219/osf.io/3v4dr · Cited by 1
(2011) · Wiley eBooks · doi:10.1002/9781444397840.refs
Rostovtseva, V. V., Mezentseva, A. A., & Бутовская, М. Л. (2020) · Tomsk Journal of Linguistics and Anthropology · doi:10.23951/2307-6119-2020-2-127-140
Cooperative care as origins of the “happy ape”?
Yang, F. (2023) · Behavioral and Brain Sciences · doi:10.1017/s0140525x22001832
McNaughton, N., & Lages, Y. (2024) · Personality Neuroscience · doi:10.1017/pen.2024.1
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.002.0008
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.002.0005
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.002.0004
Lyons, N. (2019) · Oxford University Press eBooks · doi:10.1093/oso/9780190941260.002.0003
Emotion and Nonverbal Communication
Svetieva, E. (2024) · Oxford University Press eBooks · doi:10.1093/oxfordhb/9780197544754.013.38
Facial Emotion Recognition and Detection Using Convolutional Neural Networks
Singh, Y. B., & Kumar, H. (2024) · International Journal for Research in Applied Science and Engineering Technology · doi:10.22214/ijraset.2024.62660
Performance analysis of emotion detection using machine learning algorithms
Jatin, J., Raj, K., & Vidhya, R. (2024) · AIP conference proceedings · doi:10.1063/5.0217097
Deep learning detects subtle facial expressions in a multilevel society primate
Fang, G., Peng, X., Xie, P., Ren, J., Peng, S., Feng, X., Tian, X., Mingzhu, Z. H. O. U., Zhibo, L. I., Peng, J., et al. (2024) · Integrative Zoology · doi:10.1111/1749-4877.12905
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0001
Conclusion: Of a Different Mind
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0009
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0002
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0004
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0003
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0006
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.003.0005
Dacey, M. (2025) · Oxford University Press eBooks · doi:10.1093/9780198928102.002.0006
Social behavior in primates and its neural correlates
Qi, G., & Chang, S. W. C. (2025) · Elsevier eBooks · doi:10.1016/b978-0-443-27380-3.00002-6
Ueno, M., Yamada, K., & Nakamichi, M. (2025) · International Journal of Primatology · doi:10.1007/s10764-025-00512-3
Chimpanzees' and gorillas' intraspecific gestural laterality : a multifactorial investigation
Prieur, J. (2015) · theses.fr (ABES) · doi:10.70675/ab685171z146ez4cdazbe38zf5d9818810c3 · Cited by 8
The interplay of action selection and attention allocation in response to social threat
Vilarem, E. (2017) · theses.fr (ABES) · doi:10.70675/3c09a85dz8323z47dazb88bz6d66af348726
The cognition of auditory smiles : a computational approach
Arias, P. (2018) · theses.fr (ABES) · doi:10.70675/39621da1z3127z4638z9350zd37bc3c74e2f
Illocutionary Complexity: An Approach to the Nature and Origins of Dependent Illocutionary ActsPreprint
Gómez, J. B. (2026) · SSRN Electronic Journal · doi:10.2139/ssrn.6591389
Su, F., Wang, Y., Li, X., Wei, Y., & Tian, Y. (2026) · Animals · doi:10.3390/ani16162578
Elephant gestural communication during agonistic interactions: repertoire, intentionality, and goals
Eleuteri, V., Letrari, A., Bates, L. A., Hobaiter, C., & Stoeger, A. S. (2026) · Animal Cognition · doi:10.1007/s10071-026-02108-7
Metadata
- Authors
- Parr, L. A., & Waller, B. M.
- Affiliations
- Emory University (US)
- Venue
- Social Cognitive and Affective Neuroscience
- Publisher
- Oxford University Press (OUP)
- Published
- 2006-12-01
- Volume
- 1
- Issue
- 3
- Pages
- 221-228
- ISSN
- 1749-5016 (ISSN-L)
- 1749-5024
- PMC
- PMC2555422
- OpenAlex
- W2125674694
- Cited by
- 160
- References
- 64
- Citations by year
- 2026: 4 · 2025: 19 · 2024: 12 · 2023: 14 · 2022: 7 · 2021: 12 · 2020: 8 · 2019: 22 · 2018: 7 · 2017: 13 · 2016: 8 · 2015: 7 · 2014: 4 · 2013: 5 · 2012: 5
- FWCI
- 0.17
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Social Cognitive and Affective Neuroscience (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Nottingham Trent University's Institutional Repository (Nottingham Trent Repository) (submittedVersion)
- Funders
- National Institutes of Health
- Yerkes National Primate Research Center, Emory University (R01-MH068791, -00165, RR 00165)
- National Institute of Mental Health (R01MH068791)
- National Center for Research Resources (RR-00 165, P51RR000165)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Primate Behavior and Ecology
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Evolutionary Psychology and Human Behavior
- Keywords
- emotional communication, evolution of communication, configural processing, facial expression categorization, social organization
- MeSH terms
- Affect, Animals, Animal Communication, Behavior, Animal, Pan troglodytes, Biological Evolution, Facial Expression, Humans, Social Behavior, Social Perception
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review