NLP Lie Detection.pdf

L IE D ETECTION

C ALIBRATION

The process of cabraton s reatvey easy once perfected. It nvoves the recognton of a set of standard

reactons that an ndvdual wl estabsh durng the routne of normal conversaton. When respondng to non-

senstve questons, we automatcay estabsh basene verbal and non-verbal reactons. Once these have

been dentfed, the conversaton may move to address more senstve questons. A comparson of the

ndvduas reactons to these questons may be made to the reactons to the earer questons. If there

seems to be a arge dfference n response characterstcs to the same type of stye of queston, t s probaby

far to assume that the ndvdual s yng.

Body postures may aso be cabrated. Honest body anguage may be nterpreted as uprght, open and

reaxed, eanng forward and frontay agned, wth dynamc changes n posture. Conversey, deceptve body

anguage may be nterpreted as souchng or retreatng, rgd and mmobe wth erratc posture changes,

non-frontal agnment and restng of the head aganst a hand or uprght. Indvduas paced n hgh-stress

stuatons where they feel under pressure, often souch backwards when sttng, tendng to sgnfy a retreat

from the hoste scenaro.

D ECEPTIVE G ESTURES

Deceptve gestures may be cassfed nto four man groups : personal gestures, groomng gestures,

supportve and protectve gestures and external gestures.

Personal Gestures

Rubbng and wrngng of hands

Scratchng, pckng

Pung of nose or earobes

Pung, twrng of har

Lckng of ps

Sghs and yawns

Wpng sweat from hands, brow, neck

Knucke poppng, drummng of fngers

Shuffng, tappng and swngng of feet

Leg bouncng

Adjustment of cothng or accessores

Dustng, nt pckng, thread pung

Fxng or straghtenng har

Nal nspecton, btng, chewng

Groomng Gestures

Supportve and Protectve

Gestures

Head or chn on hand

Coverng of mouth or eyes

Hdng of hands or feet

Crossng arms or egs

Smokng

Lookng n purse or brefcase

Payng wth other objects

External Gestures

M Wams

Produced for http://devoted.to/derren

VERBAL BEHAVIOURAL CUES

Verbal response cues ceary dffer drastcay between ndvduas, but sted beow s a broad outne of

deceptve and non-deceptve verbal behavoural cues. They are by no means defntve so consder these wth

a heath warnng.

Truthful Responses

Deceptve Responses

Responds drecty

Answers queston

Denes broady

Uses descrptve anguage (e.g. stea)

Confdent denas

Spontaneous response

Less formal denal

Answers evasvey

Queston not answered

Denes specfcay

Avods descrptve anguage

Boster credbty of denas wth oaths

Rehearsed responses

More formal denal

PARALINGUISTIC BEHAVIOURAL CUES

Truthful Cues

Deceptve Cues

Answer questons n rate wth the conversaton - generay

wthn a haf second

Increasng rate, ptch and voume

No erasures

Eary responses, or deayed responses

Decreasng rate, ptch and voume

Erasures

In the category of eary or deayed responses, consder stang tactcs .e.: askng to repeat or change the

queston.

In the category of erasures, consder behavour occurrng before or after that effectvey erase' the

statement .e.: coughng, snffng, aughng, cearng of throat. These usuay resut from a mspaced sense

of yng too conspcuousy and the gut assocated wth yng.

Research nto the anguage of yng shows that ars, generay, more mpausbe answers, gve

shorter responses, make fewer sef references and gve more ndrect repes.

EYE ACCESSING CUES IN LIE DETECTION

ÐSomebody may mantan eye contact when theyre yng because they thnk that when youre teng

the truth you make eye contact, and when you e you break eye contact, whch s of course as Ive

just sad, n order to fnd nformaton n your head, you have to ook away. Its very dffcut to do that

when youre mantanng eye contact Î you dont need to ook away when you e because you dont

need to reay get that nformaton, so you can afford to keep ookng straght at the person. So agan

youve broken the pattern, youve roncay done the opposte of what you magne woud be the

case.Ñ

Derren Brown : Speakng on the Rado 4 documentary ÐPants on FreÑ

M Wams

Produced for http://devoted.to/derren

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