Method and system for detection of deception using scaled P300 scalp amplitude distribution
AssigneeJ. Peter Rosenfeld Ph.D.
InventorJ. Peter Rosenfeld
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Abstract
A method and system for testing for untruthfulness in a subject. In a testing session, at least one test stimulus is presented to the subject. The subject's brain waves are sensed from at least two locations of the subject's scalp to obtain a scaled distribution representing the subject's response to the at least one test stimulus. The distribution obtained in response to the test stimulus is compared to a similarly scaled control distribution of the subject's brain waves. The control distribution represents the brain waves sensed from the at least two locations of the subject's scalp in response to a control stimulus. The subject's truthfulness in response to the at least one test stimulus is inferred from the comparison.
Claims40
A system for detecting untruthfulness in a subject comprising:
- equipment for administering one or more testing sessions, each of said one or more testing sessions comprising presenting at least one test to the subject and obtaining a reply to said at least one test from the subject the untruthfulness of which is to be determined;
- sensing equipment responsive to brain waves from at least two locations of a subject's scalp and producing output signals indicative thereof, each of said output signals having a peak amplitude associated with each reply;
- and
- analysis equipment including a program responsive to said output signals for generating a test profile representing the relationship between said peak amplitudes sensed at said at least two locations for each reply and comparing said test-profile to a previously obtained control profile for which truthfulness by the subject has been established.
A method for detecting untruthfulness in a subject, said method comprising the steps of:
- presenting a trial to a subject;
- during said trial, obtaining brain wave measurements from at least two scalp sites of the subject;
- calculating a peak amplitude for each brain wave measurement from each site;
- generating a profile representative of the relationship between said peak amplitudes from the at least two sites;
- and
- comparing said profile of said brain wave measurements to a profile for which truthfulness has been established.
A system for determining truthfulness of a subject and having sensing equipment responsive to brain waves from at least two scalp sites of the subject and a test session in which the subject replies to a presentation of a test stimulus, the system comprising:
- means for obtaining a control profile representing P300 responses of a subject at a plurality of scalp sites;
- means for presenting the subject with a plurality of trials;
- means for obtaining a response profile of the subject representing P300 responses of the subject at said plurality of scalp sites to said plurality of trials;
- and
- means for comparing said response profile to said control profile as an indicator of truthfulness.
A method for detecting untruthfulness in a subject, said method comprising the steps of:
- presenting a trial to a subject;
- during said trial, obtaining brain wave measurements from at least two scalp sites of the subject;
- calculating a peak amplitude for the brain wave measurements from each site;
- generating a curve from said peak amplitudes from the at least two sites, said curve representing a test profile of said brain wave measurements;
- and
- comparing said test profile curve of said brain wave measurements to a similarly obtained control profile curve for which truthfulness has been established.
Dependencies are inferred from the claim text.