Processing Difficulty Partial Lateralization Of Brain Function And The Influence Of Interaction

According to the Banich’s theory hypothesis of hemispheric interaction in terms of task processing complexity,this study adopted within visual field(inner hemisphere) and cross visual field (inter hemisphere) techniques to probe into the interhemispheric lateralization and integrated effect of processing complexity on the phonological and semantic processing of Chinese phonetic characters. Experiment1controlled the phonological complexity of words by varying their regularity(whether the pronunciation of phonetic is the same as the whole characters).We consider the task of processing completely regular characters as an easy task,processing completely irregular characters as an difficult task. The participants had to judge whether the pronunciation of two Chinese characters is exactly the same. The results revealed that:Compared with completely regular characters, the average correct response of processing completely irregular characters is longer and the accuracy of it is more low; the average correct response of the left hemisphere on processing completely irregular characters is longer than that of the right hemisphere. Experiment2manipulated the semantic complexity of words by varying their prototypicality (whether the semantic radicals are agreeing with the grammatical classes of the words,).We consider the task of processing transparent verbs as an easy task, and processing non-transparent verbs as an difficult task. The participants had to judge whether the two Chinese characters are all verbs. The results revealed that: Compared with transparent verbs, the average correct response of processing non-transparent verbs is longer and the accuracy of it is more low; the average correct response of the interhemispheric on processing non-transparent verbs is longer than that of the left and rightl hemisphere. The above results prompted:(1) If the particular kind of processing strongly lateralized to an unilateral hemisphere,such as the phonological task, an increase in processing complexity will reinforce the advantage of the dominant hemisphere;(2) Hemispheric interactions in complex language processing is profitable only when the particular kind of processing is not strongly lateralized to an unilateral hemisphere,such as the semantic processing...