Brain fingerprinting is a lie detection technique which uses electroencephalography (EEG) to determine whether specific information is stored in a subject's brain. The technique consists of measuring and recording a person's electrical brainwaves and brain response when asked questions about a crime, attempting to elicit a "P300 response" that indicates familiarity with the details of the crime. The technique is controversial, unproven and of questionable accuracy. Comparison of brain fingerprinting with polygraphy showed mixed results consistent with "a mix of proven techniques and dangerously exaggerated benefits".
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Farwell, L.A.., Richardson, D.C., & Richardson, G.M. (2013). Brain fingerprinting field studies comparing P300-MERMER and P300 brainwave responses in the detection of concealed information. DOI 10.1007/s11571-012-9230-0, Cognitive Neurodynamics 7(4): 263-299 (PDF); Cognitive Neurodynamics website
Farwell L.A., Richardson D.C., Richardson G.M .and Furedy J.J. (2014). Brain fingerprinting classification concealed information test detects US Navy military medical information with P300. Front. Neurosci. 8:410. doi: 10.3389/fnins.2014.00410
Farwell, L. (2014). Brain Fingerprinting: Detection of Concealed Information, in Wiley Encyclopedia of Forensic Science, A. Jamieson and A.A. Moenssens, eds. Chichester: John Wiley. DOI: 10.1002/9780470061589.fsa1013. Published 16th June 2014 (PDF). Wiley Online Library
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