Objective:
To explore the event-related potential (ERP) differences of people with typical traditional Chinese medicine (TCM) “five-state personality” in the task of judging the emotional attributes (positive, neutral, and negative) of Chinese words.
Methods:
The “five-state personality test” was applied to screen the typical TCM “five-state personality”, and three groups were established including positive personality, negative personality, and atypical personality. The differences of electroencephalogram (EEG) components in the task of judging the emotional attributes of Chinese words were collected using ERPs. The 3 personality groups ×3 words with emotional attributes were analyzed by two-way analysis of variance (ANOVA).
Results:
The N1 and P300 components were induced successfully. The analysis on the mean values of corresponding electrodes in left frontal lobe, right frontal lobe, frontal lobe and parietal lobe showed that in the typical negative personality group, the absolute value of N1 amplitude was smaller in the prefrontal and frontal lobes, and the latency was shorter in the left frontal lobe, while in the typical positive personality group, the absolute value of N1 amplitude was larger in the left frontal lobe. In the prefrontal and frontal lobes, the N1 peak absolute value of negative words was higher and the latency was longer, and the N1 latency of neutral words was shorter. The N1 latency of positive words was shorter in the parietal lobe. In the right frontal and frontal lobes, the P300 peak of negative words was higher and the latency was longer, while the latency of positive words was longer in the parietal lobe. In addition, there was some interaction between personality groups and emotional attributes of words.
Conclusion:
When people with typical “five-state personality” judge the emotional attributes of words, the absolute value of N1 amplitude in left prefrontal lobe of typical positive personality group is high, while that of typical negative personality group was small and the latency is short. The P300 latency of negative words is longer in the right frontal and frontal lobes, and that of positive words is longer in the parietal lobes, with more significant difference in the positive personality group.
