Humans’ left cheek portrait bias extends to chimpanzees: Depictions of chimps on Instagram

References

• Bruno, N., Bertamini, M., & Protti, F. (2015). Selfie and the city: A world-wide, large, and ecologically valid database reveals a two-pronged side bias in naïve self-portraits. PLoS ONE, 10(4), e0124999. doi: 10.1371/journal.pone.0124999
   PubMed Web of Science ®Google Scholar
• Burrows, A. M., Waller, B. M., Parr, L. A., & Bonar, C. J. (2006). Muscles of facial expression in the chimpanzee (Pan troglodytes): Descriptive, comparative, and phylogenetic contexts. Journal of Anatomy, 208, 153–168. doi: 10.1111/j.1469-7580.2006.00523.x
   PubMed Web of Science ®Google Scholar
• Demaree, H. A., Everhart, E., Youngstrom, E. A., & Harrison, D. W. (2005). Brain lateralization of emotional processing: Historical roots and a future incorporating “dominance”. Behavioural and Cognitive Neuroscience Review, 4, 3–20. doi: 10.1177/1534582305276837
   PubMedGoogle Scholar
• Fernández-Carriba, S., Loeches, Á, Morcillo, A., & Hopkins, W. D. (2002). Asymmetry in facial expression of emotions by chimpanzees. Neuropsychologia, 40, 1523–1533. doi: 10.1016/S0028-3932(02)00028-3
   PubMed Web of Science ®Google Scholar
• Harrison, M. A., & Hall, A. E. (2010). Anthropomorphism, empathy, and perceived communicative ability vary with phylogenetic relatedness to humans. Journal of Social, Evolutionary, and Cultural Psychology, 4(1), 34–48. doi: 10.1037/h0099303
   Google Scholar
• LaBar, M. (1973). Turning the left cheek examined using modern photography. Nature, 245, 338. doi: 10.1038/245338a0
   Web of Science ®Google Scholar
• Lindell, A. K. (2013a). Continuities in emotion lateralization in human and non-human primates. Frontiers in Human Neuroscience, 7, 464. doi: 10.3389/fnhum.2013.00464
   PubMedGoogle Scholar
• Lindell, A. K. (2013b). The silent social/emotional signals in left and right cheek poses: A literature review. Laterality, 18, 612–624. doi: 10.1080/1357650X.2012.737330
   PubMed Web of Science ®Google Scholar
• Lindell, A. K. (2019). Left cheek poses garner more likes: The effect of pose orientation on Instagram engagement. Laterality, 24(5), 600–613. doi: 10.1080/1357650X.2018.1556278
   PubMed Web of Science ®Google Scholar
• Manovich, L., Ferrari, V., & Bruno, N. (2017). Selfie-takers prefer left cheeks: Converging evidence from the (extended) selfiecity database. Frontiers in Psychology, 8, 1460. doi: 10.3389/fpsyg.2017.01460
   PubMed Web of Science ®Google Scholar
• McManus, I. C., & Humphrey, N. K. (1973). Turning the left cheek. Nature, 243, 271–272. doi: 10.1038/243271a0
   Web of Science ®Google Scholar
• Morecraft, R. J., Louie, J. L., Herrick, J. L., & Stilwell-Morecraft, K. S. (2001). Cortical innervation of the facial nucleus in the non-human primate: A new interpretation of the effects of stroke and related subtotal brain trauma on the muscles of facial expression. Brain, 124, 176–208. doi: 10.1093/brain/124.1.176
   PubMed Web of Science ®Google Scholar
• Nicholls, M. E. R., Clode, D., Lindell, A. K., & Wood, A. G. (2002). Which cheek to turn? The effect of gender and emotional expressivity on posing behaviour. Brain and Cognition, 48, 480–484. doi: 10.1006/brcg.2001.1402
   PubMed Web of Science ®Google Scholar
• Nicholls, M. E. R., Clode, D., Wood, S. J., & Wood, A. G. (1999). Laterality of expression in portraiture: Putting your best cheek forward. Proceedings of the Royal Society of London (Section B), 266, 1517–1522. doi: 10.1098/rspb.1999.0809
   PubMed Web of Science ®Google Scholar
• Nicholls, M. E. R., Ellis, B. E., Clement, J., & Yoshino, M. (2004). Detecting hemifacial asymmetries in emotional expression with 3D computerised image analysis. Proceedings of the Royal Society, 271, 663–668. doi: 10.1098/rspb.2003.2660
   PubMed Web of Science ®Google Scholar
• Parr, L. A., Waller, B. M., Vick, S. J., & Bard, K. A. (2007). Classifying chimpanzee facial expressions by muscle action. Emotion, 7, 172–181. doi: 10.1037/1528-3542.7.1.172
   PubMed Web of Science ®Google Scholar
• Patten, J. (1996). Neurological differential diagnosis (2nd ed.). New York, NY: Springer-Verlag.
   Google Scholar
• Prüfer, K., Munch, K., Hellmann, I., Akagi, K., Miller, J. R., Walenz, B., … Pääbo, S. (2012). The bonobo genome comparedwith the chimpanzee and human genomes. Nature, 486, 527–531. doi: 10.1038/nature11128
   PubMed Web of Science ®Google Scholar
• Sackeim, H. A., Gur, R. C., & Saucy, M. C. (1978). Emotions are expressed more intensely on the left side of the face. Science, 202, 434–436. doi: 10.1126/science.705335
   PubMed Web of Science ®Google Scholar
• Suler, J. (2008). Image, word, action: Interpersonal dynamics in a photo-sharing community. CyberPsychology & Behavior, 11(5), 555–561. doi: 10.1089/cpb.2007.0153
   PubMedGoogle Scholar
• Systrom, K. (2018, June 20). From our CEO Kevin Systrom (instagram.com/kevin) “Today, we have two big announcements to share. First, Instagram is now a global community of one billion! [Facebook status update]. Retrieved from https://www.facebook.com/InstagramEnglish/videos/2021766097857435/
   Google Scholar
• Thomas, N. A., Burkitt, J. A., Patrick, R. E., & Elias, L. J. (2008). The lighter side of advertising: Investigating posing and lighting biases. Laterality, 13(6), 504–513. doi: 10.1080/13576500802249538
   PubMed Web of Science ®Google Scholar
• Thomas, N. A., Burkitt, J. A., & Saucier, D. M. (2006). Photographer preference or image purpose? An investigation of posing bias in mammalian and non-mammalian species. Laterality, 11(4), 350–354. doi: 10.1080/13576500600623983
   PubMed Web of Science ®Google Scholar
• Wildman, D. E., Uddin, M., Liu, G., Grossman, L. I., & Goodman, M. (2003). Implications of natural selection in shaping 99.4% nonsynonymous DNA identity between humans and chimpanzees: Enlarging genus Homo. Proceedings of the National Academy of Sciences, 100(12), 7181–7188. doi: 10.1073/pnas.1232172100
   PubMed Web of Science ®Google Scholar