Editing Microexpression (section)

==Moods vs emotions==
Moods differ from emotions in that the feelings involved last over a longer period. For example, a feeling of anger lasting for just a few minutes, or even for an hour, is called an emotion. But if the person remains angry all day, or becomes angry a dozen times during that day, or is angry for days, then it is a mood.<ref>Ekman, P. & Friesen, W.V. (2003). ''Unmasking the Face''. Cambridge: Malor Books. p. 12.</ref> Many people describe this as a person being irritable, or that the person is in an angry mood. As [[Paul Ekman]] described, it is possible but unlikely for a person in this mood to show a complete anger facial expression. More often just a trace of that angry facial expression may be held over a considerable period: a tightened jaw or tensed lower eyelid, or lip pressed against lip, or brows drawn down and together.<ref>Ekman, P. & Friesen, W..V. (2003). ''Unmasking the Face''. Cambridge: Malor Books. pp. 12–13.</ref>
Emotions are defined as a complex pattern of changes, including physiological arousal, feelings, cognitive processes, and behavioral reactions, made in response to a situation perceived to be personally significant.<ref>{{cite web|url=http://www.apa.org/research/action/glossary.aspx#e|title = APA Dictionary of Psychology}}</ref>