Liars are given away by facial ticks which cause raised eyebrows and hints of a smile, a study has claimed.
By Andrew Hough 6:45AM BST 05 Apr 2012
Researchers found four facial muscles “leaked” a person’s true feelings, such as guilt, amid intense emotional pressures.
The team from the University of British Columbia, in Canada, concluded that liars were betrayed by tiny movements that caused them to raise their eyebrows in surprised expressions and smile slightly.
Innocent people, meanwhile, tended to furrow their brow in genuine “expressions of distress”, they found.
The study, published in the journal Evolution and Human Behaviour, concluded that a person’s lack of control over their facial expressions meant genuine feelings could be differentiated from fake emotion.
Psychologists say most humans can control lower face muscles in order to talk or eat but those in the upper face are difficult to manipulate and can spark involuntary behaviour.