1. Insincere smile
While a real smile raises the corners of people's eyes and changes the whole face, a fake smile shapes only the mouth.
2. Unnatural speed of response
Someone who planned to lie in advance will answer questions more quickly than usual. If you surprise them and they decide to lie suddenly, the response will come too late.
3. Verbal signals
Lying increases the tone of voice. Other striking verbal signals include incoherent speech and a special choice of words that do not respond to the question, or stuttering.
4. Increased or decreased saliva production
Notice a sudden swallowing or an increased need to drink.
5. Dilated pupils
This is one of the nonverbal signals most difficult to simulate.
6. Changes in blinking
When someone decides to lie, their blinking frequency becomes significantly lower. Right after telling the lie, it noticeably increases.
7. Foot movements
Nervousness when lying is also reflected in the intensity of foot movements. Watch, therefore, how calmly your counterpart sits.
8. Touching the face
Liars often involuntarily rub their nose, cover their mouth or eyes.
9. Inconsistency between words and gestures
When someone believes what they say, words and gestures are in harmony. If, however, words and gestures are contradictory, they are probably lying.
10. Changes in gestures
Liars' efforts to control their body language tend to cause other unnatural gestures. These include biting lips, rubbing hands, playing with jewellery or hair.
11. Fleeting expressions
If you notice an expression - albeit fleeting - that does not match the spoken words, believe what you see and not what you hear.
12. Dodging glance
After telling a lie, most liars immediately look downwards and away. Then they look at you again to see whether you believe them.
-kk-