Effects Of Different Dominance And Task Types On Emotional Brain Alienation And Cooperation

Objective:This study used the Chinese affective words as experimental material, based on the theories of emotional hemisphere laterality, exploring how the different dominance and task types effects the emotional processing hemispheric laterality. At the same time, exploreing how the emotional information of Chinese words integrate between two hemispheres.Methods:Using the Chinese affective words as experimental material, in terms of the two dimensions (emotional valence and dominance) the words are classified, and balance the emotional arousal and familiarity of the words. Experiment1used the lexical decision task, which is a implicit processing on emotional aspects of words; experiment2used the lexical emotional valence discrimination task, which is a explicit processing on emotional aspects of words.Both experiments were performed using the "go/no go" task, recorded simple reaction time. Participants in Experiment1were asked to react to the real words (no/go) but not the false words (go); Experiment2is divided into different blocks, participants were asked to respond to positive words (no/go), but not the negative words (go), or, to the negative words (no/go) but not the positive words (go) respectively. Using the new experimental paradigm which used to explore brain hemisphere lateralization and cooperation, presenting an interference stimulation respectively in the left visual field, the right visual field, or both do not, to exploring the mechanism of the left, right or bilateral brain.Results:The experiment1shows:(1) In high dominance level, there is no significantly hemispheric laterality in the processing of positive words, and the processing of interhemispheric cooperation is better than unilateral hemispheric; processing of neutral words conform to the traditional "left hemispheric advantage" theory, and the processing of hemispheric cooperation is better than unilateral hemispheric; there is no significantly hemispheric laterality in processing of negative words, and no effect of interhemispheric cooperation processing gain;(2)In low dominance level, the processing of positive words conform to the traditional "left hemispheric advantage" theory, but there is no hemispheric cooperation gain; the processing on the neutral words appear a reversal effect of left hemispheric dominance, that is, the right hemispheric processing has advantages than the left one, and there is a interhemispheric cooperation gain too; the processing on the negative words appear a reversal effect of "left hemispheric advantage" theory too, but reveal a consistent between interhemispheric cooperation and right hemispheric processing.The experiment2shows:(1) In high dominance level, the lexical processing of left hemispheric was significantly slower than the right hemispheric and interhemi-spheric cooperation.(2) In high dominance level, there were no significant differences between processing of the positive words and the negative words; in middle level of the dominance, processing of the positive words have more advantages than the negative words; in low dominance level, processing of the positive words have more advantages than the negative words, and this effect is more than the moderate dominance level.Conclusions:(1)The different dominance influence the individual subjective experience, which affects emotional hemispheric laterality processing mechanism;(2) The different task types influence the processing depth of emotional vocabulary information, which affects the emotional brain hemisphere laterality processing mechanism;(3)The emotional information of lexical integration between the hemispheres also affected by the different dominance and task types.