Deception Detection – Notes

Posted: November 18, 2009 in Mentalism

Since I began researching into deception, and the signs to look out for, I’ve been taking quite a few notes down and I thought it’d be a good idea to post them on here. Now some of them probably wont make any sense to you at all, but I’ll be going into deeper detail about the specific signs to look out for, and i’ll also be talking about the type of behaviour a liar would show.  Here are the notes anyway.

  • Note the fact of possible lieing, dig deeper into conversation before confronting
  • Body never Lies – less or no hand gestures could indicate lieing – full extension of fingers can mean openness and honesty
  • Closed Body Language indicates hiding something, i.e crossed legs/folded arms
  • If hand moves straight to face when answering a question it can indicate deception, hand may cover mouth indicating she doesnt believe what shes saying, acting as a screen to hide a lie
  • Fleeting shoulder shrugs, trying to show they’re relaxed when they’re not
  • Gestures need to be looked at by themselves and in relation to what is said, i.e saying yes but shaking your head as if to say no
  • timing is everything – Head shakes before words come out, indicates truth
  • Head-shake after words have been said, indicates deception
  • Contradiction – types of gestures, i.e frowning when saying i love you, indicates deception
  • timing of emotion is difficult to fake, not spontaneous, emotion delayed coming on, stays longer than it should, disapears quickly
  • Fake surprise, eye brows up for more than 1-2 seconds
  • Deception expressions confind to mouth area
  • real smile involves the whole face, fake smile around the mouth only
  • Innocent become offensive, guilty become become defensive
  • head may shift away from person talking, indicates uncomfortable or distancing, immediate jerking of the head, or slow withdraw backwards
  • Posture of a liar – Confident sits up straight and tall, unsure of themselves stand hunched, hands in pockets
  • truth tellers move closer to the person, liars move away a little
  • Doesnt touch the person, lower intimacy if lieing
  • Someone who is lieing/hiding something never points a finger at another person
  • Putting objects between you and him, physical barrier, deception or covert intention
  • Verbal Content – Words = true feelings, deception uses certain words
  • Using words to make his point, doesn’t have time to think so reflects back statement, uses other persons words in negative
  • “Did you cheat on me”.. “no i didn’t cheat on you” did becomes didn’t
  • “it wasnt me” usually deception “it was not me” truthful
  • A liar will try harder to convince you, a truth person will always be willing to clarify what he has said
  • Voice slip, subconscious slip, true feelings or thoughts
  • Responses such as “I would never lie to you, you should believe me” usually indicates deception
  • Evidence doesn’t way favourably for him, so brings in believe system as backup
  • Silence – the guilty are uncomfortable with silence, adds more information without being prodded
  • Guilty tells stories in dribs and drabs, talks to stop silence
  • Implied answer is no answer, attempts to avoid question by implying something
    • Implied answer is no answer, attempts to avoid question by implying something Emphasis on different parts of sentence can mean different meanings
    • truthful statements a fast no or yes is followed by explanation
    • Liars fast no or yes, is often followed slowly by an explanation
    • Compensation – Reaction out of proportion to question or comment
    • Exaggerates fake anger, protests innocents
    • Repeating points already made
    • I, we and Us are underused or absent, doesn’t want to own words, distancing
    • Speaking more softly, voice may become higher and faster if scared, poor sentence structure
    • Questiions and statements shouldn’t sound alike
    • Con artists accuse others of cheating
    • Always asking to be believed
    • Most people who tell the truth expect to be believed
    • No points of view from others included in the story
    • Events made up include only primary thoughts, positive
    • Listen when subject is changed, do they seem more relaxed? how fast does mood change?
    • Guilty wants the subjects changed
    • If accused of something and is not offended, then caught off guard and worried about how to respond
    • “to be perfectly honest” “to be frank” “to tell the truth” – if not part of usual speech for that person, indicates deception
    • Rehearsed answers often contain information that you didn’t ask for
    • Question Deflection
    • “Could you repeat the question” “it depends how you look at it” “why did you ask something like that” “could you be more specific?” “how dare you ask me something like that” = question deflection, doesn’t want to answer
    • If something sounds too good, investigate further
    • A lie through implication, when someone says what they’re NOT doing, usually it means that’s what they were doing “not to hurt your feelings, but..”
    • beware of the person who uses humour or sarcasm instead of answering
    • Facts appear inconsistent with each other
    • Liars faces can become slightly more flushed/whiter, controlled breathing
    • Trembling in the voice
    • Swallowing becomes difficult for liars, hard swallowing
    • Signs of distraction and unable to pay attention
    • uses your words to support their claim
    • Downplaying suspicious things, e.g going to a business meeting
    • “don’t you think if i was going to lie to you i would have come up with something a little more believable” indicates deception
    • Questions you about your questions

Please Note: It is important to discover a baseline before looking for these signs, how does the person usually act? It is also important to note that any sign listed above seen on its own does not mean a person is lieing. You need to see at least 4-5 of these signs, and again its important to know the persons baseline before confronting them about lieing.

  1. […] CLICK HERE to view “Deception Detection Notes” article. […]

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