Emotional State Assessment Using Pre/Post Vector Difference
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Solution Overview
Problem
Existing methods for assessing dynamic emotional states using EEG are limited by high cost, low mobility, and long preparation times, and require supplementation with additional tools to accurately measure emotional changes induced by sensory stimuli.
Innovation Solution
A method and system that combines semiotic instruments with cognitive instruments (linguistic, aural, and visual) to assess pre- and post-emotional states, using a vector difference to quantify altered emotional states through sensory stimuli, supplemented by EEG data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If EEG recording systems are used to assess emotional states, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The system segments the complex EEG assessment task into multiple simpler cognitive instruments (linguistic, aural, visual) that can be administered separately. Each instrument targets specific cognitive domains, allowing the complex emotional state assessment to be broken down into manageable components that reduce overall system complexity while maintaining measurement precision.
Solution Approach 2:
The cognitive instruments serve multiple functions: they assess emotional states, evaluate cognitive processing, and provide validation for EEG data. By making these instruments multi-functional, the system reduces the need for separate specialized tools, thereby reducing device complexity and cost while maintaining comprehensive assessment capability.
2Measurement precision
If high-density EEG recording systems are used, then measurement precision is improved, but loss of time increases due to long preparation times
Solution Approach 1:
The system performs preliminary assessments using cognitive instruments before administering the full EEG protocol. This preliminary action identifies baseline emotional and cognitive states, allowing the EEG assessment to be more targeted and efficient. The cognitive instruments are designed to be quickly administered and scored, reducing overall preparation time while maintaining measurement precision.
Solution Approach 2:
The system uses a combination of partial EEG recording (focusing on specific brain regions relevant to emotional processing) supplemented by comprehensive cognitive instrument assessment. This partial action approach to EEG, combined with the broader cognitive assessment, achieves comprehensive emotional state measurement with reduced preparation time compared to full-density EEG alone.
3Measurement precision
If EEG alone is used to assess dynamic emotions, then measurement precision is improved, but adaptability decreases because additional tools are needed to capture emotional changes induced by sensory stimuli
Solution Approach 1:
The system merges EEG physiological measurement with cognitive instrument assessment and sensory stimulus presentation into an integrated framework. The cognitive instruments (linguistic, aural, visual) are specifically designed to respond to different types of sensory stimuli, and when combined with EEG data, provide a comprehensive view of emotional state changes that neither method could achieve alone, thereby enhancing adaptability while maintaining precision.
Solution Approach 2:
The cognitive instruments serve as intermediaries between sensory stimuli and EEG measurement. They translate subjective emotional experiences into quantifiable data that can be correlated with physiological EEG signals. This intermediary role allows the system to capture the nuanced relationship between sensory input, emotional processing, and physiological response, enhancing both adaptability and measurement precision.
Data Source
AI summary
This disclosure relates generally to a method and system for assessing an altered emotional state under the influence of a sensory stimulus. The sensory stimulus are known to have a sub-conscious influence on the emotional state of a person. This is effectively utilized in businesses to improve customer experience, and thus increasing sales. State-of-the-art methods assesses the altered brain state by measuring one or more physiological parameters using fairly complex apparatuses like electroencephalogram (EEG). The disclosed method involves assessing (i) a pre-emotional state before exposing a subject to the sensor stimulus, and (ii) a post-emotional state after exposing the subject to the sensory stimulus. The altered emotional state of the subject is obtained by a vector difference between the pre-emotional state and the post-emotional state which is an angular difference calculated as a cosine of an angle between the pre-emotional state and post-emotional state.