Editing Face (section)

===Emotional expression===
Faces are essential to expressing [[emotion]], consciously or unconsciously. A frown denotes disapproval; a smile usually means someone is pleased. Being able to read emotion in another's face is "the fundamental basis for empathy and the ability to interpret a person's reactions and predict the probability of ensuing behaviors". One study used the Multimodal Emotion Recognition Test<ref>[http://www.affective-sciences.org/MERT Multimodal Emotion Recognition Test (MERT) | Swiss Center for Affective Sciences] {{webarchive|url=https://web.archive.org/web/20110903094920/http://www.affective-sciences.org/MERT |date=2011-09-03 }}. Affective-sciences.org. Retrieved on 2011-04-29.</ref> to attempt to determine how to measure emotion. This research aimed at using a measuring device to accomplish what many people do every day: read emotion in a face.<ref>{{cite journal|author1=Bänziger, T.|author2=Grandjean, D.|author3=Scherer, K. R.|name-list-style=amp|year=2009|title=Emotion recognition from expressions in face, voice, and body: The Multimodal Emotion Recognition Test (MERT)|journal=Emotion|volume=9|issue=5|pages=691–704|doi=10.1037/a0017088|pmid=19803591|url=http://cms2.unige.ch/fapse/neuroemo/pdf/BaenzigerGrandjeanScherer-Emotion2009.pdf|citeseerx=10.1.1.455.8892|access-date=2017-11-01|archive-date=2017-08-08|archive-url=https://web.archive.org/web/20170808050957/http://cms2.unige.ch/fapse/neuroemo/pdf/BaenzigerGrandjeanScherer-Emotion2009.pdf|url-status=dead}}</ref>

The muscles of the face play a prominent role in the expression of emotion,<ref name="Moore" /> and vary among different individuals, giving rise to additional diversity in expression and facial features.<ref name="Braus 1921">{{cite book | title=Anatomie des Menschen: ein Lehrbuch für Studierende und Ärzte | author=Braus, Hermann | year=1921 | pages=777}}</ref>
[[Image:Braus 1921 379.png|right|thumb|250px|Variations of the [[risorius]], [[triangularis]] and [[Zygomaticus major muscle|zygomaticus]] muscles]]

People are also relatively good at determining if a smile is real or fake. A recent study looked at individuals judging forced and genuine smiles. While young and elderly participants equally could tell the difference for smiling young people, the "older adult participants outperformed young adult participants in distinguishing between posed and spontaneous smiles".<ref>{{cite journal|author1=Murphy, N. A. |author2=Lehrfeld, J. M. |author3= Isaacowitz, D. M. |name-list-style=amp |year=2010|title=Recognition of posed and spontaneous dynamic smiles in young and older adults|journal= Psychology and Aging|volume= 25|issue=4|pages=811–821|doi=10.1037/a0019888|pmid=20718538|pmc=3011054}}</ref> This suggests that with experience and age, we become more accurate at perceiving true emotions across various age groups.