What Works Global Summit. Register now.

Putting evidence at the heart of policy and practice. 26th - 28th September.

Learn more

Plant Science Panel

Insecticides, biofuels, GMOs …

Learn more

'The Ugly Truth'

by Tracey Brown, director of Sense About Science

Learn more

Measuring government transparency

New framework rates use of evidence

Learn more

Publications and resources

Sense About Lie Detectors Image

Sense About Lie Detectors

Lie detectors have been around for nearly 100 years.  Despite debates over their accuracy and the ethics and legality of their use, the public and professionals remain intrigued by them. Lie detectors mainly consist of polygraphs, voice analysis or brain imaging. These technologies are different but three points are relevant to all:

  1. They are not accurate.
  2. They do not measure lies but rather something that could be a proxy for lies.
  3. They all rely on the deterrent effect (that is, fear of being caught lying).

Document type: Sense About

Published: 31 July 2012


Back · New resources search