Method and system for detection of deception using scaled P300 scalp amplitude distribution
First Claim
1. 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.
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Accused Products
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.
42 Citations
40 Claims
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1. A system for detecting untruthfulness in a subject comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 22, 37, 38)
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12. A method for detecting untruthfulness in a subject, said method comprising the steps of:
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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. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 23, 39, 40)
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20. 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:
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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. - View Dependent Claims (21, 24, 25)
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26. A method for detecting untruthfulness in a subject, said method comprising the steps of:
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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. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification