1. Gallese, V., Fadiga, L., Fogassi, L., & Rizzolatti, G. (1996). Action recognition in the premotor cortex. Brain, 119(2), 593-609. doi:10.1093/brain/119.2.593
  2. Ramachandran, V. (2012). The tell-tale brain: A neuroscientist’s quest for what makes us human. New York: W. W. Norton.
  3. Iacoboni, M. (2009). Mirroring people: The science of empathy and how we connect with others. New York: Picador.
  4. Darwin, C. R., & Lorenz, K. (1970). The expression of the emotions in man and animals. Chicago: The University of Chicago Press.
  5. Ekman, P., & Friesen, W. V. (2003). Unmasking the face a guide to recognizing emotions from facial clues. Cambridge, MA: Malor Books.
  6. Duchenne, G., & Cuthbertson, R. A. (2006). The mechanism of human facial expression (Original work from 1862). Cambridge: Cambridge University Press
  7. 11 Insane (But True) Things About Smiling: | World-Leading … (n.d.). Retrieved May 29, 2020, from
  8. Ekman, P. (2007). Emotions revealed: Recognizing faces and feelings to improve communication and emotional life. New York: St. Martin’s Griffin.
  9. Riess, H., Neporent, L., & Alda, A. (2018). The empathy effect: Seven neuroscience-based keys for transforming the way we live, love, work, and connect across differences. Boulder, CO: Sounds True.
  10. Rifkin, J. (2016). The empathic civilization: The race to global consciousness in a world in crisis. Cambridge: Polity.
  11. Waal, F. B. (2020). Mama’s last hug: Animal emotions and what they teach us about ourselves. London: Granta.
  12. Dimberg, U. (1982). Facial Reactions to Facial Expressions. Psychophysiology, 19(6), 643-647. doi:10.1111/j.1469-8986.1982.tb02516.x
  13. Dimbeg, U. (1997). Psychophysiological reactions to facial expressions. In Nonverbal communication: Where nature meets culture (pp. 47-60). Mahwah, NJ: Lawrence Eribaum Associates.