In popular media, the polygraph and fMRI lie detector tests are depicted as being highly accurate, but the underlying premise of the polygraph is dubious, and scientific evidence strongly suggests they are ineffective.

Selected sources:

Study of 34 studies totaling 3099 polygraph examinations “naïve examinees, untrained in countermeasures.” (often psychology university students, military recruits): [ Ссылка ]

The brain gets used to lying, so people who lie more often may be less detectable: [ Ссылка ]
FMRI studies on guilt vs. innocence. Source: [ Ссылка ]

Source of graphic on fMRI study on lying: [ Ссылка ]

fMRI lie detection is 24% more accurate [ Ссылка ]

a study on Mock crime fMRI showing 9/9 sensitivity and 5/15 (33%) specificity: [ Ссылка ]

Information about the polygraph from anti-polygraph: [ Ссылка ]

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Dr. Brandon Beaber is a board-certified neurologist with subspecialty training in multiple sclerosis and other immunological diseases of the nervous system. He is a partner in the Southern California Permanente Medical Group and practices in Downey, California (South Los Angeles). He has several publications on MS epidemiology and has participated in clinical trials for MS therapeutics. You can follow him on twitter @Brandon_Beaber where he regularly posts about MS news and research.

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he video material by Dr. Brandon Beaber is general educational material on health conditions and is not intended to be used by viewers to diagnose or treat any individual's medical condition. Specifically, this material is not a substitute for individualized diagnostic and treatment advice by a qualified medical/health practitioner, licensed in your jurisdiction, who has access to the relevant information available from diagnostic testing, medical interviews, and a physical examination. To the extent that Dr. Beaber endorses any lifestyle change, behavioral intervention, or supplements, the viewer should consult with a qualified healthcare professional to determine the safety and efficacy of the intervention in light of their individualized information.

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