Research On Cerebral Hemisphere Processing Lateralization Of Chinese Spatial Word

The lateralization of Chinese Characters is a main subject in Cognitive Psychology and Psycholinguistics. The brain usually takes some specific strategy to deal with the Chinese Character in the cognitive processing course. This research selected spatial words which have representative characteristics as experimental materials and adopted visual half-field technique to probe into the Cerebral Hemisphere Processing Lateralization.The research was made up of three experiments.The first experiment required the participants to make the "same/different form" judgments between the pairs of spatial words and the ordinary noun in order to investigate the effects of hemispheric asymmetries. The results showed that there was a RVF (left hemispheric) advantage in the spatial words form processing and a balanced advantage in the the common noun form processing on the reaction time. There is no lateralization effect on the accuracy rate.The second experiment required the paticpants to classify the spatial words from the target stimulus and to investigate the effects of hemispheric asymmetries and inter-hemispheric integration in semantic processing. The results showed that there was no advantage in the single hemisphere on the reaction time and the accuracy rate in the simple semantic classification task, and figured out an interhemisphere integration. This showed that the two hemispheres which are public participation can promote the simple semantic processing. The reaction time and the accuracy rate of the spatial words are better than the ordinary noun which can explain the trend of prior processing to the spatial words in the cognitive processing.The third experiment demanded the participants to make a opposite decision to the target stimulus (spatial words) in order to investigate the effects of hemispheric asymmetries in the complicated semantic processing. It turned out that MVF was remarkably better than LVF and RVF on the reaction time and the accuracy rate.One way, the RVF (left hemisphere) was faster than the LVF (right hemisphere) on the reaction time, but there was no significant difference. On the other way, RVF (left hemisphere) was better than LVF (right hemisphere) on the accuracy rate.The experimental result can be explained by the Composition-Age model. The hemisphere lateralization of stimulus words can be decided by the style of the domain properties (spatial words are the semantic domain specific properties) and the age when the paticipants become the bilingual.We can infer that left hemisphere offers advantage in the complicated semantic processing, but we must realize that interhemispheric collaboration has more benefit than the independent process of single hemisphere.The relative consequence between experiment two and experiment three corresponds with the two hemispheres interreaction theory based on the task difficulty(Banich,2003).The results showed a transfer from the single hemisphere to the interhemisphere on the advantage by the improved difficulty of task.