Editing Microexpression (section)

==Controlled microexpressions==
Facial expressions are not just uncontrolled instances. Some may in fact be voluntary and others involuntary, and thus some may be truthful and others false or misleading.<ref>Ekman, P. & Friesen, W.V. (2003). ''Unmasking the Face''. Cambridge: Malor Books. p. 19.</ref> Facial expression may be controlled or uncontrolled. Some people are born able to control their expressions (such as pathological liars), while others are trained, for example actors. "Natural liars" may be aware of their ability to control microexpressions, and so may those who know them well; they may have been "getting away" with things since childhood due to greater ease in fooling their parents, teachers, and friends.<ref>Ekman, P. (1991). ''Telling Lies Clues to deceit in the Marketplace, Politics, and Marriage''. New York: W.W. Norton & Company Inc., p. 56.</ref> People can simulate emotion expressions, attempting to create the impression that they feel an emotion when they are not experiencing it at all. A person may show an expression that looks like fear when in fact they feel nothing, or perhaps some other emotion.<ref>Ekman, P. & Friesen, W.V. (2003). ''Unmasking the Face''. Cambridge: Malor Books. p. 20.</ref> Facial expressions of emotion are controlled for various reasons, whether cultural or by social conventions. For example, in the United States many little boys learn the cultural display rule, "little men do not cry or look afraid". There are also more personal display rules, not learned by most people within a culture, but the product of the idiosyncrasies of a particular family. A child may be taught never to look angrily at his father, or never to show sadness when disappointed. These display rules, whether cultural ones shared by most people or personal, individual ones, are usually so well-learned, and learned so early, that the control of the facial expression they dictate is done automatically without thinking or awareness.<ref>Ekman, P. & Friesen, W.V. (2003). ''Unmasking the Face''. Cambridge: Malor Books. pp. 20–21.</ref>