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Here are 3-evidence-based ways in which one can detect a lie:-
Body movements- Giving a lie makes one uneasy, apprehensive,
a feeling of guilt may pervade one mind and body movements becomes inevitable
which makes the liar easy to detect. Even when one is conscious not to make any
body movement there will be still those micro-movements or micro-expressions
that give the game away. The ambiguity of this matter is that there are no
universal specifications for body language when one lies but the liar will
always act differently. People trained on lie detection may not listen to the
credibility of what the subject has to say but may concentrate more on the body
language and behavior change during interrogation. Body movements could harbor
biasness especially when interrogating people from different regions or
individual with certain repetitive behavioral tendencies.
Verbal cues- considering that body language may harbor some
biasness and subjects can also master their mannerism to cover their lies,
probing the subjects further on the issue at hand may help to uncover the lie.
These may help uncover a lie using verbal cues:-
- Use open-ended question- as the liar tries to fabricate the story they will lose the momentum and experience blocks in their though process. Ensure an eye contact is maintained.
- Interject the subjects as they uncover the story and you can raise the game by telling them to uncover the story from the end to the beginning. This increases the cognitive load and if it was a lie, the subject may lose the flow of the event and finally will contradict self.
Be observant and watch down regulation of the subject
confidence during the conversation. When the liar thinks is in control of the
conversation they are more candid. Challenging their stream of thought in a
different and clever way makes them feel like they are no longer in control and
their confidence may diminish as more challenges comes along.
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REFERENCES:
The best (and worst) ways to detect a liar- BBC.
Address: http://www.bbc.com/future/story/20150906-the-best-and-worst-ways-to-spot-a-liar