The difficulty with lying is that the subconscious mind acts automatically and independently of our verbal lie, so our body language gives us away. This is why people who rarely tell lies are easily caught, regardless of how convincing they may sound. The moment they begin to lie, the body sends out contradictory signals, and these give us our feeling that they are not telling the truth. During the lie, the subconscious mind sends out nervous energy that appears as a gesture that can contradict what the person said. Some people whose jobs involve lying, such as politicians, lawyers, actors and television announcers, have refined their body gestures to the point where it is difficult to 'see' the lie, and people fall for it, hook, line and sinker.
They refine their gestures in one of two ways. First, they practise what 'feel' like the right gestures when they tell the lie, but this is only successful when they have practised telling numerous lies over long periods of time. Second, they can eliminate most gestures so that they do' not use any positive or negative gestures while lying, but this is also very difficult to do.
Try this simple test when an occasion presents itself. Tell a deliberate lie to an acquaintance and make a conscious effort to suppress all body gestures while your body is in full view of the other person. Even when your major body gestures are consciously suppressed, numerous microgestures will still be transmitted. These include facial muscular twitching, expansion and contraction of pupils, sweating at the brow, flushing of the cheeks, increased rate of eye blinking and numerous other minute gestures that signal deceit. Research using slow motion cameras shows that these microgestures can occur within a split second and it is only people such as professional interviewers, sales people and those whom we call perceptive who can consciously see them during a conversation or negotiation. The best interviewers and sales people are those who have developed the unconscious ability to read the microgestures during face-to-face encounters.
It is obvious, then, that to be able to lie successfully, you must have your body hidden or out of sight. This is why police interrogation involves placing the suspect on a chair in the open or placing him under lights with his body in full view of the interrogators; his lies are much easier to see under those circumstances. Naturally, telling lies is easier if you are sitting behind a desk where your body is partially hidden, or while peering over a fence or behind a closed door. The best way to lie is over the telephone!
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