Electroencephalogram signal feature detection method based on hidden behaviors of consciousness conflicts and system thereof

Abstract

The invention provides an electroencephalogram signal feature detection method based on hidden behaviors of consciousness conflicts and a system thereof. The method is based on a conflict monitoring theory in cognitive psychology, and because a conflict exists between hidden active consciousness and individual subconsciousness to irritants, activation of a cognitive conflict monitoring brain areais initiated, so that related electroencephalogram signal characteristics are generated. The method comprises the following steps: providing a psychological test stimulation material based on the conflict detection theory and a special operation reaction of the psychological test stimulation material; enhancing memory through target stimulation; constructing a guide language or a guide scene; testing a testee to obtain an electroencephalogram signal of the testee; performing multiple processing on electroencephalogram signals, extracting an event-related electroencephalogram feature map of thehidden behaviors, screening out electroencephalogram feature indexes of the hidden behaviors, and automatically identifying the hidden behaviors by applying a machine learning and mode identificationmethod based on the features. According to the method, the electroencephalogram characteristics of the hidden behaviors can be quickly and effectively recognized, the credibility of the answering result of the testee is evaluated, the application range is wide, and the applicability is high.

Description

Technical field [0001] The invention relates to the technical field of EEG psychological testing, in particular to an EEG signal feature detection method and system based on concealment behavior of conflict of consciousness. Background technique [0002] EEG psychological testing technology refers to the subject's cognitive processing events based on event-related potential technology in the field of lie detection, with case investigation content or psychological test questions as the subject's cognitive processing events, and real-time recording and analysis of the subject's cognitive processing of events Scalp surface potential, a technique for assessing the credibility of the answer given by the subject. [0003] From the perspective of EEG psychological test, cognitive EEG is the brain's neuroelectricity in the cognitive process of the subject’s perception, attention, memory, understanding, thinking and judgment of questions, views, speech, etc. Physiological changes. Cogniti...

AI Technical Summary

Problems solved by technology

[0004] As we all know, polygraph detection technology is often used in criminal investigation, intelligence and other fields, but at present, polygraph detection is only carried out through human cross-examination, and concealment behavior cannot be effectively identified, resulting in low credibility of polygraph detection results

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