brain finger-print

brain fingerprinting

noun
a technology for determining whether specific knowledge or information is stored in a person's brain, by showing the person certain words or pictures and measuring brain-wave response: Brain fingerprinting proved that the suspect recognized the murder victim.

brain fingerprint, noun
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World English Dictionary
brain fingerprinting
 
n
a technique in which sensors worn on the head are used to measure the involuntary brain activity of someone in response to certain images or pieces of evidence pertaining to a crime

Collins English Dictionary - Complete & Unabridged 10th Edition
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