Facial Expressions.....What are they?
Many took that work to imply that facial expressions provided the key to people's feelings. But in recent years the psychology literature has been sprinkled with hotly worded attacks by detractors who claim that there is no one-to-one correspondence between facial expressions and emotions. In fact, they argue, there's no evidence to support a link between what appears on someone's face and how they feel inside."
"Last less than ½ second: they occur when people are consciously or unconsciously trying to conceal or repress what they are feeling." - See more at: http://www.humintell.com/macroexpressions-microexpressions-and-subtle-expressions/#sthash.saqoYyHA.dpuf
Micro-Expressions of liars
"He is also asked if he ever witnessed or suspected illegal drug use among players. His answer: 'I never saw'- here, his left shoulder lifts - 'anything. I never had raw evidence.'"
Micro-expressions are used by police, investigators, FBI, and others to detect liars and other micro-expressions that commonly go undetected. With a little information and studying, you too could read micro-expressions and be a lie detector yourself!
Read the full article on.... http://www.nytimes.com/2009/02/15/weekinreview/15marsh.html