High frequency of blinking
As Entrepreneur.com reports, one of the easy-to-detect signals that someone is lying is an increased frequency of blinking. In short, the person in question suddenly starts blinking rapidly.
Eyes darting
Someone who is lying has a hard time maintaining eye contact. So they run their eyes over the other person and the room.
Fidgeting with hands or feet
Nervous hand or foot tapping usually indicates nervousness. And this often goes hand in hand with lying.
Rapid breathing
Someone telling a deliberate lie will usually also start breathing faster and shallower.
Inconsistency of non-verbal gestures and speech
A typical manifestation of trying to lie is a mismatch between what someone says, how they move and the gestures they use.
Facial flushing
A flow of blood to the face, turning it red, also indicates nervousness or an attempt to deceive the other person.
Nervous smile
Someone who is trying to lie will often smile nervously in order somehow to intimidate the other person. This fake smile can be recognised by the fact they smile only with their mouth and not with their eyes.
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