Liars may fear polygraph tests and brain scans, but surely they wouldn't expect a simple drawing to give them away. It seems that how you draw a scene can help reveal if you really were there or just made the whole thing up. 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.
展开▼
