One of the most interesting ideas is that no single tells indicates a lie, but clusters of them together are strong signals. A few would be: 1) pausing before you answer (lies take longer to compose than truths); 2) touching your face with your hand (blood rushes from your face when the fight-or-flight response kicks in, prompting an itching sensation); 3) fidgeting at the place where your body rests on something more solid (floor, chair, armrest); 4) vacillating between an appeasing and angry tone; 5) leaning away and closing your body language.
http://www.amazon.com/Spy-Lie-Former-Officers-Deception/dp/1...
One of the most interesting ideas is that no single tells indicates a lie, but clusters of them together are strong signals. A few would be: 1) pausing before you answer (lies take longer to compose than truths); 2) touching your face with your hand (blood rushes from your face when the fight-or-flight response kicks in, prompting an itching sensation); 3) fidgeting at the place where your body rests on something more solid (floor, chair, armrest); 4) vacillating between an appeasing and angry tone; 5) leaning away and closing your body language.