Tuesday, October 13, 2009

Drawings as a lie detection tool

New Scientist


CSI: Doodle – lie detection through art

Drawn from memory? (Image: Joe Madeira)

No lie detector is anywhere near foolproof, and existing techniques, including polygraph tests and brain scans, have the added drawback of requiring specialised, expensive equipment, says Aldert Vrij, a forensic psychologist at the University of Portsmouth, UK.

clipped from abcnews.go.com
Vrij wondered whether asking someone to draw a scene might work instead: as liars have not had direct visual experience of what they are describing, they might draw a scene differently to someone who was actually there.

clipped from www.port.ac.uk

Psychology

Aldert Vrij
Prof. Aldert Vrij
Applied Cognitive Psychology
Drawings as an innovative and successful lie detection tool
Aldert Vrij 1 *, Sharon Leal 1, Samantha Mann 1, Lara Warmelink 1, Par Anders Granhag 2, Ronald P. Fisher 3

N e u r o n a r r a t i v e

If You Want to Catch a Liar, Make Him Draw

interrogation

Using the “sketching the agent” result alone, it was possible to identify 80% of the truth tellers and 87% of the liars – results superior to most traditional interview techniques.


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