Clues that suggest people are lying may be deceptive, study shows

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The verbal and physical signs of lying are harder to detect than people believe, a study suggests.

Tests reveal that people are skilled at identifying commonly displayed cues—such as hesitations and hand gestures—but these signs are produced more often when someone is telling the truth.

Liars are also skilled at supressing these signals to avoid detection, researchers found.

Psychologists used an interactive game to assess the types of speech and gestures speakers produce when lying, and which clues listeners interpret as evidence that a statement is false.

Researcher Jia Loy, from the University of Edinburgh, created a computerised two-player game in which 24 pairs of players hunted for treasure. Players were free to lie at will.

Researchers coded more than 1100 utterances produced by speakers against 19 potential cues to lying—such as pauses in speech, changes in rate, shifts in and eyebrow movements.

The cues were analysed to see which ones listeners identified, and which cues were more likely to be produced when telling an untruth.

The team found listeners were efficient at identifying these common signs.

Listeners make judgements on whether something is true within a few hundred milliseconds of encountering a cue.

However, they found that the common cues associated with lying were more likely to be used if the is telling the truth.

Researchers say the study helps understand the psychological dynamics that shape deception.

Lead researcher Dr. Martin Corley, of the University of Edinburgh's School of Philosophy, Psychology and Language Sciences, said: "The findings suggests that we have strong preconceptions about the behaviour associated with lying, which we act on almost instinctively when listening to others. However, we don't necessarily produce these cues when we're lying, perhaps because we try to suppress them."


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More information: Jia E. Loy et al, Cues to Lying May be Deceptive: Speaker and Listener Behaviour in an Interactive Game of Deception, Journal of Cognition (2018). DOI: 10.5334/joc.46
Citation: Clues that suggest people are lying may be deceptive, study shows (2018, October 12) retrieved 19 September 2019 from https://medicalxpress.com/news/2018-10-clues-people-lying-deceptive.html
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Oct 12, 2018
The weakness of this approach is that whilst certain cues may be identified when a particular individual is lying relative to their truth telling, it does not hold when comparing individuals as one person may show signs of lying when telling the truth.

Having suffered social anxiety in the past I am aware of how a person can appear to be lying and even feel like lies are being told when telling the truth during a particularly anxious episode, the anxiety being very similar to that experience by an individual when attempting deception and realising that this is failing and their deception is exposed (exposure being the locus of social anxiety).

Thus to be consistent a baseline must always be established for a particular individual before relative truth and deception cues can be consistently interpreted. I understand hat something similar is required for polygraph tests.

Oct 13, 2018
I'd have to dive into the paper to know what they mean by language cues. I find much about evasive language which is quite easy to identify if you're a logical enough person.

Sophie and Silas - http://wwwscienti...las.html

http://wwwscienti...age.html - this link has all my findings linked inthe replies section

Oct 13, 2018
Deceptive

Oct 13, 2018
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