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Psychology

How to detect a lie?
by

Anja Kohl

on 2 February 2016

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Transcript of Psychology

Baldridge: So Dr. Lightman just assumes you're a liar if you're a politician?
Gillian Foster: He assumes you're a liar if you're a Homo sapien.
Become a human lie detector
Polygraph a.k.a. lie detector
Jimmy Kimmel as a lie detective
The truth about lying - refuse to be deceived by knowing the signs
Definition of
lie

Anja Kohl/Tamara Schmidt [2015]
Webography
A lie is a statement that is known or intended by its source to be misleading, inaccurate, or false.


Two types of lies:
Lies of omission:
Withholding the truth by simply not telling a fact
Lies of commission:

Falsification of information



Cal Lightman: I don't have much faith in words, myself. Statistically speaking, the average person tells three lies per ten minutes conversation.

http://sharpbrains.com/wp-content/uploads/2007/06/scientificamericanmind_logo.jpg
http://blogs-images.forbes.com/peterubel/files/2013/02/truthlies.gif
https://en.wikiquote.org/wiki/Lie_to_Me_(TV_series)
http://hbculifestyle.com/wp-content/uploads/2013/08/So-You-Want-to-be-a-Polygraph-Examiner.jpg
http://eldergadget.com/wp-content/uploads/2012/02/Liar.jpg

http://www.thehopeline.com/different-kinds-of-lies-you-tell/
http://www.scienceofpeople.com/2014/08/different-types-lies/
http://www.selfgrowth.com/articles/How_To_Tell_When_Someone_Is_Lying.html
http://www.truthliesdeceptioncoverups.info/2014/07/categories-of-lies-white-lies-grey-lies.html
http://theconversation.com/truth-is-everyone-lies-all-the-time-6749
http://science.howstuffworks.com/question123.htm
http://www.scienceofpeople.com/do-you-know-when-someone-is-lying-to-you-new/
http://www.lifespan.com/10-easy-ways-recognize-liars/2/
http://time.com/77940/detect-lying/

Invented 1921 by John Augustus Larson, a medical student and police officer
Sensors attached to person recording:
Pulse
Blood pressure
Perspiration (sweat rate)
Respiration (breath rate)
Significant change indicates a lie
Two steps:
Baselining
Ask neutral questions on topics with no reasons to lie about
Pay attention to the person's look, sound of voice and behaviour
Noticing change in baseline

Fidgeting
Turn away from you
Blink rapidly
Smile less
Changes in tone of voice
Cross their arms
Sweating, blushing, difficulty swallowing
Avoid eyecontact or hold eyecontact all the time
Full transcript