Method for the analysis, display and classification of event related potentials by interpretation of P3 responses

• US 4,932,416 A
• Filed: 05/01/1987
• Issued: 06/12/1990
• Est. Priority Date: 05/01/1987
• Status: Expired due to Term

• Current Assignee: Northwestern University
• Original Assignee: Northwestern University
• Inventors: Rosenfeld, Joel P.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/045,069
• Time in Patent Office: 1,138 Days
• Field of Search: 128/731-732, 128/733, 128/745-766
• US Class Current: 600/544
• CPC Class Codes: A61B 5/16 Devices for psychotechnics using teaching or educational appliances G09B1/00 - G09B7/00; Testing reaction times ; Devices for evaluating the psychological state
• CPC Class Codes: A61B 5/164 Lie detection
• CPC Class Codes: A61B 5/377 using evoked responses
• 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

Abstract

A method for recording and analyzing event-related potentials (ERP), and their respective P300 brain wave responses from a repeatedly presented guilty knowledge or control question stimulus interspersed with non-significant stimuli. A computer is utilized to interpret and analyze the responses for guilty knowledge and control question procedures.

Claims

1. A method of determining the cognitive response to personally meaningful information of a subject to a repeatedly presented significant guilty knowledge stimulus or stimuli interspersed with nonsignificant stimuli comprising:

(a) providing a source of stipulation to the subject, including said guilty knowledge and said nonsignificant stimuli;

(b) providing detection means for detecting event related potentials;

(c) translating event related potentials to P300 brain waves;

(d) obtaining P300 brain wave activity; and

(e) analyzing said P300 brain wave activity for guilty knowledge detection.

2. The method of claim 1 wherein the event related potentials are detected, translated into P300 brain waves and analyzed by a computer.

4. The method of claim 1 or 3 wherein the stimuli may be visual or auditory.

5. The method of claim 1 or 3 wherein the stimuli may be words.

3. A method of determining the cognitive response to personally meaningful information of a subject to a repeatedly presented significant control question stimulus or stimuli interspersed with non-significant stimuli comprising:

(a) providing a source of stimulation to the subject, including said guilty knowledge and said nonsignificant stimuli;

(b) providing detection means for detecting event related potentials;

(c) translating event related potentials to P300 brain waves;

(d) obtaining P300 brain have activity; and

(e) analyzing said P300 brain wave activity for control question testing.