Lie-detector tests for terrorist convicts are just a Hollywood stunt | Letter

Michael Attwood says there is no scientific basis whatsoever for polygraph tests – all they measure is anxietyLie-detector tests don’t work (Terrorist convicts to face lie detector tests after release, 21 January). Not only is there no scientific basis for conducting the tests, there is also no evidence the results are reliable. This is the official position of the American Psychological Association. Rather, the lying is inferred by the human operator, based on observing physiologica