Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New lie detection technique for terror suspects

05.09.2006
A leading deception expert has called for law enforcement agencies to do away with lie detector tests when questioning terror suspects because they are too unreliable.

Professor Aldert Vrij from the University of Portsmouth said conventional law enforcement lie detection tools that focus on a suspect’s ‘arousal-based’ responses to key questions are not accurate enough against the increased threat of terrorism and international crime.

He called for the introduction of the cognitive-load approach – an innovative new method that cranks up the brainpower a suspect needs under questioning.

This is done by carefully designing questioning protocols to make suspects think significantly harder at specific times during a police interview. The suspect is given secondary tasks such as telling their stories in reverse order, or recalling information relayed through a set of headphones.

... more about:
»Detection »Vrij »cognitive »liars »lie

The cognitive-load approach is a marked departure from the status quo in law enforcement where most lie detection tools use arousal-based protocols that assume liars will be more aroused under questioning because of the fear of getting caught.

'The trouble with this is that liars do not necessarily reveal more signs of arousal when answering key questions and, conversely, truth tellers might be anxious and hence show signs of arousal when answering key questions,' Professor Vrij said.

‘The cognitive-load approach is based on the idea that lying in an interview setting is cognitively demanding as liars have to think harder to concentrate on extra demands such as what others are thinking, keeping their story straight, and monitoring and controlling their behaviour so they avoid creating the impression they are lying.

'Liars, whose cognitive resources will already be partially depleted by the act of lying, should find this additional, concurrent task particularly debilitating. This should show up as a poorer performance in the primary task (e.g. providing a statement during the interview), and also on the secondary task.'

Professor Vrij said when people lied they used 'higher' brain areas such as the prefrontal cortex and it had already been proven that increased activity in these areas inhibited ongoing unnecessary motor behaviour such as fidgeting.*

He cited recent experimental tests where police officers watching videos of real-life suspects were more accurately able to discriminate between liars and truth tellers by being asked 'How hard is the person thinking?'

The police officers also thought suspects looked less nervous when lying than when they were telling the truth.

'If lying is cognitively demanding, then attending to signs of cognitive load should improve people's ability to detect deception,' he said.

Professor Vrij was speaking at the BA Festival of Science in Norwich where he presented the paper Why Professionals Fail to Catch Liars and How They Can Improve.

(* Spence, S.A. et al. (2004) A cognitive neurobiological account of deception: evidence from functional neuroimaging. Philos. Trans. T.Soc Lond. 359, 1755- 1762).

Rajiv Maharaj | alfa
Further information:
http://www.port.ac.uk

Further reports about: Detection Vrij cognitive liars lie

More articles from Life Sciences:

nachricht Velcro for human cells
16.01.2019 | Albert-Ludwigs-Universität Freiburg im Breisgau

nachricht More efficient solar cells imitate photosynthesis
16.01.2019 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

Im Focus: Nanocellulose for novel implants: Ears from the 3D-printer

Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.

It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:

Im Focus: Elucidating the Atomic Mechanism of Superlubricity

The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.

One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...

Im Focus: Mission completed – EU partners successfully test new technologies for space robots in Morocco

Just in time for Christmas, a Mars-analogue mission in Morocco, coordinated by the Robotics Innovation Center of the German Research Center for Artificial Intelligence (DFKI) as part of the SRC project FACILITATORS, has been successfully completed. SRC, the Strategic Research Cluster on Space Robotics Technologies, is a program of the European Union to support research and development in space technologies. From mid-November to mid-December 2018, a team of more than 30 scientists from 11 countries tested technologies for future exploration of Mars and Moon in the desert of the Maghreb state.

Close to the border with Algeria, the Erfoud region in Morocco – known to tourists for its impressive sand dunes – offered ideal conditions for the four-week...

Im Focus: Programming light on a chip

Research opens doors in photonic quantum information processing, optical signal processing and microwave photonics

Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a new integrated photonics platform that can...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

Velcro for human cells

16.01.2019 | Life Sciences

Kiel physicists discover new effect in the interaction of plasmas with solids

16.01.2019 | Physics and Astronomy

The pace at which the world’s permafrost soils are warming

16.01.2019 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>