Abstract
Event-related potentials were recorded while 13 normal young subjects (age range 23-32 years) were recognizing Chinese words presented in either auditory or visual modality. The “sustained central negativity” (SCN) elicited by spoken words and the “late positive component” (LPC) evoked by written ones were observed, this suggested different retrieval mechanism between them. The old/new effect was significant for both recognition of written and spoken Chinese characters, that is, the old items yielded more positive-going ERP components than did the new items. However, the effect in the sound recalling is dominant over the right hemisphere and that for the written words distributes at the left parietal, posterior temporal scalp and right occipital area. The result of the present experiment proposes the concept that the “dominant hemisphere” is hard to conclude the multidimensional and dynamic relationship between hemispheres and it is necessary to be modified.
| Keywords: | memory; recognition; event-related potential (ERP); sustained central negativity (SCN); late positive component (LPC) |
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