Method for a classification guilty knowledge test and integrated system for detection of deception and information

• US 20050143629A1
• Filed: 06/21/2004
• Published: 06/30/2005
• Est. Priority Date: 06/20/2003
• Status: Abandoned Application

• Current Assignee: Lawrence A. Farwell
• Original Assignee: Lawrence A. Farwell
• Inventors: Farwell, Lawrence A.
• Application Number:
  US10/872,967
• Publication Number:
  US 20050143629A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/164 Lie detection
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/372 Analysis of electroencephalograms
• CPC Class Codes: A61B 5/4035 Evaluating the autonomic nervous system
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: G16H 50/20 for computer-aided diagnosis, e.g. based on medical expert systems

Abstract

A method for detecting deception or information possessed by a subject is disclosed. A subject is presented with known relevant stimuli, irrelevant stimuli, and critical relevant stimuli. Psychophysiological responses to the stimuli are measured and classified. A conclusion regarding the presence or absence of information is drawn from the classification. Many alternatives are disclosed such as measuring central nervous system responses to enhance the conclusion.

Claims

1. An apparatus for detecting deception by a test subject, information possessed by the test subject, or both, the apparatus comprising:

at least one data output device to provide testing data to the test subject;

at least one data input device to receive responses from the test subject based on the testing data; and

at least one computer, associated with at least one data storage device, and coupled among the at least one data output device and the at least one data input device;

wherein the testing data includes;

known relevant stimuli that are relevant to a specific subject matter related to specific knowledge, events, or actions, and are known to the test subject;

irrelevant stimuli that are irrelevant to the specific subject matter and

critical relevant stimuli that are relevant to the specific subject matter and that the test subject does not acknowledge knowing;

wherein the computer receives from the at least one input device, and stores in the data storage device, measurements of the test subject'"'"'s psychophysiological responses to the testing data,

wherein the stored measurements permit classifying the test subject'"'"'s responses to the critical relevant stimuli as being more similar to the test subject'"'"'s responses to the known relevant stimuli or more similar to the test subject'"'"'s responses to the irrelevant stimuli to detect deception by a test subject, information possessed by the test subject, or both.

2. The apparatus of claim 1 wherein the at least one input device includes:

a subject-actuated input device for receiving subject-selected responses to stimuli in the testing data;

at least one electroencephalogram (EEG) sensor; and

at least two different autonomic-nervous system sensors selected from the following group;

blood pressure sensor, skin conductance sensor, blood flow sensor, and breathing sensor;

wherein the computer receives data from the EEG sensor to determine recognition or processing by the test subject'"'"'s brain of at least some of the testing data;

wherein the testing data includes at least visual or auditory test data, and wherein the at least one output device includes at least one of;

a display device for providing the visual test data to the test subject;

an auditory output device for providing the auditory test data to the test subject; and

a speech synthesizer coupled between the computer and the auditory output device to provide synthesized speech to the test subject via the auditory output device.

3. The apparatus of claim 1, further comprising:

a operator station, wherein the operator station includes at least a display device coupled to the computer, and an operator input device for receiving commands from an operator.

4. The apparatus of claim 1, further comprising:

a remote computer, coupled to the at least one computer via a network, wherein the remote computer includes at least a display device coupled to the remote computer, and wherein the remote computer receives at least the measurements of the test subject'"'"'s psychophysiological responses to the testing data to classify the test subject'"'"'s responses to the critical relevant stimuli as being more similar to the test subject'"'"'s responses to the known relevant stimuli or more similar to the test subject'"'"'s responses to the irrelevant stimuli.

5. A method for detecting deception by a subject, information possessed by the subject, or both, the method comprising:

presenting a subject with testing data, wherein the testing data includes;

known relevant stimuli that are relevant to specific subject matter, wherein the known relevant stimuli are associated with the specific subject matter and are known to the subject;

irrelevant stimuli that are irrelevant to the specific subject matter; and

critical relevant stimuli that are relevant to the specific subject matter and that the subject does not acknowledge knowing;

receiving data representing the subject'"'"'s psychophysiological responses to the testing data, and,

analyzing the subject'"'"'s responses to the critical relevant stimuli as being more similar to the subject'"'"'s responses to the known relevant stimuli or more similar to the subject'"'"'s responses to the irrelevant stimuli, wherein the analyzing at least assists in determining whether the subject'"'"'s responses to the testing data indicate deception or a presence of information known to the subject.

6. The method of claim 5 wherein receiving data includes receiving from the subject overt responses to the testing data through verbal responses or non-verbal, motor responses.

7. The method of claim 5 wherein the testing data includes questions, and wherein the subject is instructed to lie in response to the known relevant stimuli and tell the truth in response to the irrelevant stimuli.

8. The method of claim 5 wherein the testing data includes questions.

9. The method of claim 5 wherein the testing data includes audiovisual data or simultaneously presented auditory and visual stimuli.

10. The method of claim 5 wherein the subject is not given instructions to respond overtly and voluntarily, but simply perceives at least a portion of the test data and involuntarily produces psychophysiological responses thereto, due content of the test data, wherein the psychophysiological responses represent knowledge that the subject has or knowledge that the subject lacks regarding matters to which at least some of the test data are relevant.

11. The method of claim 5 wherein presenting the subject with testing data includes providing the known relevant, irrelevant and critical relevant stimuli to the subject as embedded in a series of still images or video, and wherein a substantial portion of the still images or video comprises information unrelated to the specific subject matter.

12. The method of claim 5 wherein presenting the subject with testing data includes providing the known relevant, irrelevant and critical relevant stimuli to the subject as embedded in a series of visual, auditory or audiovisual test data.

13. The method of claim 5 wherein presenting the subject with testing data includes providing the subject with text data, and still images or video.

14. The method of claim 5 wherein receiving data includes receiving from the subject psychophysiological responses that include at least one of

a) skin conductance,

b) skin resistance,

c) measurements of breathing,

d) measurements of blood flow,

e) plethysmographic measurements,

f) cardiovascular measurements,

g) blood pressure,

h) electrocardiogram (EKG),

i) cardiac systolic time intervals,

j) measurements involving output of vocal cords during speech,

k) voice stress analysis,

l) eye measurements,

m) eye movement measurements,

n) pupil diameter

o) measurements of brain activity,

p) EEG,

q) measurements of cerebral blood flow,

r) measurements of a level of activation of at least one specific part of the subject'"'"'s brain,

s) at least one of magnetic resonance imaging (MRI) and functional MRI,

t) brain imaging,

u) tomography, and

v) tomography using at least one of visible light and laser light.

15. The method of claim 5 wherein receiving data includes receiving autonomic nervous system responses from the subject.

16. The method of claim 5 wherein receiving data includes receiving measurements indicative of at least one of a) stress, b) emotion, c) cognitive activity, and d) mental activity, from the subject.

17. The method of claim 5 wherein receiving data includes measuring autonomic-nervous-system-based (ANS) responses and central-nervous-system-based (CNS) responses, and

wherein the method further comprises combining the ANS and CNS responses to make a single determination regarding at least one of a) deception, b) guilty knowledge, and c) information possessed by the subject.

18. The method of claim 5 wherein the subject'"'"'s psychophysiological responses include autonomic-nervous-system-based (ANS) responses and central-nervous-system-based (CNS) responses.

19. The method of claim 5 wherein analyzing the subject'"'"'s responses includes classifying the subject'"'"'s responses with a calculated statistical confidence.

20. The method of claim 5 wherein analyzing the subject'"'"'s responses includes employing a bootstrapping analysis routine to at least some of the subject'"'"'s responses.

21. The method of claim 5 wherein analyzing the subject'"'"'s responses includes combining two or more of the subject'"'"'s psychophysiological responses.

22. The method of claim 5 wherein presenting the subject with testing data includes:

identifying for the subject at least one category to which at least some of features of the specific subject matter belong;

presenting at least two alternatives related to the identified category, wherein;

the known relevant stimuli represent correct alternatives that match the specific subject matter and are known to the subject regardless of whether the subject participated in subject matter associated with the specific subject matter,

the irrelevant stimuli are incorrect alternatives that do not match the specific subject matter, but are plausible for a subject lacking knowledge of the subject matter, and

the critical relevant stimuli are correct alternatives that match the investigated situation and that the subject does not acknowledge knowing.

23. An apparatus for detecting at least one of a) deception, b) guilty knowledge, and c) information possessed by a subject, the apparatus comprising:

means for presenting the subject with stimuli to be appreciated by at least two senses of the subject;

means for measuring autonomic-nervous-system-based (ANS) psychophysiological responses by the subject in response to at least some of the presented stimuli;

means for measuring central-nervous-system-based (CNS) psychophysiological responses by the subject in response to at least some of the presented stimuli; and

means for analyzing the CNS and ANS responses by combining at least portions of the ANS and CNS responses to facilitate a single determination regarding at least one of a) deception, b) guilty knowledge, and c) information possessed, by the subject.

24. The apparatus of claim 23, further comprising means for receiving subject-directed verbal or motor response from the subject in response to the stimuli.

25. The apparatus of claim 23 wherein the means for analyzing includes calculating a statistical confidence level from the combined ANS and CNS responses.

26. The apparatus of claim 23 wherein the means for means for measuring ANS or CNS responses include at least one sensor, and wherein the apparatus further comprises means for disguising the sensor from the subject.

27. The apparatus of claim 23, further comprising remote computing means for remotely receiving the CNS and ANS responses and providing them to the means for analyzing.

28. A computer-readable medium whose contents embody a data structure for use in detecting deception by a subject, information possessed by the subject, or both, the data structure comprising:

testing data for presentation to the subject, wherein the testing data includes;

at least one known relevant stimulus data structure that represents information relevant to specific subject matter, and wherein the relevant information is known to the subject;

at least one irrelevant stimulus data structure that represents information irrelevant to the specific subject matter; and

at least one critical relevant stimulus data structure that represents information critically relevant to the specific subject matter, and wherein the subject does not acknowledge knowing the critically relevant information.

29. The computer-readable medium of claim 28 wherein at least one of the known relevant stimuli, irrelevant stimuli or critical relevant stimuli data structures include audiovisual information.

30. The computer-readable medium of claim 28 wherein the computer-readable medium is a logical node in a computer network receiving the contents.

31. The computer-readable medium of claim 28 wherein the computer-readable medium is a computer-readable disk.

32. The computer-readable medium of claim 28 wherein the computer-readable medium is a data transmission medium carrying a generated data signal containing the contents.

33. The computer-readable medium of claim 28 wherein the computer-readable medium is a memory of a computer system.

34. A system for detecting deception by a subject, information possessed by the subject, or both, the system comprising:

at least one input device;

at least one output device;

at least one computer coupled among the input and output devices,

wherein the computer is programmed to

present the subject with stimuli in at least one of a) the auditory modality and b) the visual modality, via the at least one output device, wherein the stimuli are presented under a predetermined time course;

measure, via the at least one input device, psychophysiological responses to the stimuli by the subject, and timing of the responses based on the predetermined time course; and

process the responses and provide output for use in detecting at least one of a) deception and b) information possessed by the subject, wherein the processing includes the consideration of the timing or time course of the responses.

35. The system of claim 34 wherein the stimuli include computer-generated speech or digitized speech.

36. The system of claim 34 wherein the stimuli include continuous audiovisual data lasting longer than any individual stimulus of interest and longer than any individual response from the subject.

37. The system of claim 34 wherein the stimuli include at least two of a) irrelevant stimuli, b) known relevant stimuli, and 3) critical relevant stimuli.

38. The system of claim 34, further comprising a data transmitter for transmitting to a remote computer data at least related to the responses.

39. The system of claim 34 wherein the responses includes both overt responses and psychophysiological responses from the subject.

40. The system of claim 34 wherein the responses are used as an aid in conducting at least one of interrogation and negotiation.

41. The system of claim 34 wherein the responses are measured either remotely or covertly.

42. A method for detection of information possessed by a subject regarding specific subject matter, the method comprising:

presenting the subject with at least three types of stimuli, including;

target stimuli that are relevant to the specific subject matter, that were encountered by any individuals who participated in events or actions related to the specific subject matter, and that are known to the subject by i) the subject being exposed subsequent to the events or actions to information connecting the target stimuli to the events or actions, or ii) the subject being informed of the target stimuli and their connection to the events or actions before presenting the subject with the at least three types of stimuli;

probe stimuli that are relevant to the events or actions, that were encountered by any individuals who participated in the events or actions, and that the subject does not acknowledge knowing, denies are significant to him, or denies being able to distinguish from irrelevant stimuli with respect to the specific subject matter;

irrelevant stimuli that are irrelevant to the specific subject matter, wherein some of the irrelevant stimuli are similar to the target stimuli and would be indistinguishable from target stimuli by a person lacking knowledge of the specific subject matter, and wherein some of the irrelevant stimuli are similar to and would be indistinguishable from probe stimuli for a person lacking knowledge of the specific subject matter; and

obtaining psychophysiological responses to at least some of the stimuli.

43. The method of claim 42, further comprising classifying the responses to the probe stimuli as being more similar to the responses to the target stimuli or more similar to the responses to the irrelevant stimuli.

44. The method of claim 42, further comprising drawing at least one conclusion regarding presence or absence of information possessed by the subject.

45. The method in claim 42 wherein the subject is instructed to not make any voluntary or overt responses.

46. The method in claim 42 wherein the psychophysiological responses include measurements of brain activity.

47. The method in claim 42 wherein the psychophysiological responses include EEG measurements.

48. The method in claim 42 wherein the psychophysiological responses include event-related brain potential (ERP) measurements.

49. The method in claim 42 wherein the psychophysiological responses include memory and encoding related electroencephalographic response (MERMER) measurements.

50. A method of at least one of a) interrogation b) negotiation, and c) verbal interaction comprising:

substantially continuously monitoring at least two of the following different psychophysiological measurements in a human subject during a verbal interaction, without regard to a specific, yes-or-no answer to a question;

a) skin conductance, b) skin resistance, c) measurements of breathing, d) measurements of blood flow, e) plethysmographic measurements, f) cardiovascular measurements, g) blood pressure, h) electrocardiogram (EKG), i) cardiac systolic time intervals, j) measurements involving output of vocal cords during speech, k) voice stress analysis, l) eye measurements, m) eye movement measurements, n) pupil diameter, o) ANS measures, p) CNS measures;

substantially continuously or periodically analyzing the at least two different psychophysiological measurements, wherein the analyzing includes combining the at least two different psychophysiological measurements; and

determining at least one of a) emotional responses, b) emotional state, c) cognitive responses, and d) mental state of the human subject based on the analysis to assist in conducting the at least one of a) interrogation b) negotiation, and c) verbal interaction.

51. The method in claim 50 wherein the monitoring is conducted remotely, covertly, or both.