electrophysiological estimates of the time course of semantic and phonological encoding in chinese speech production

• Main Authors: Lou On I, 勞安兒
• Other Authors: Chiu Yi Shuan
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/49047691011555453021

碩士 === 輔仁大學 === 心理學系 === 98 === Previous research has shown that semantic processing precedes phonological processing in alphabetical language production (such as Dutch, English and German). The present study investigated the relative time course of semantic and phonological processing during Mandarin Chinese production. In Experiment 1, participants were asked to carry out the semantic decision task (whether the picture was of a living or non-living object) and phonological decision task (based on the end phoneme of the picture’s name). The RTs of semantic judgment were shorter than those of phonological judgment, suggesting that the semantic processing had high priority in timing and showed less difficult in task demand. While including both semantic and phonological judgments in Experiment 2-1 and Experiment 2-2, we utilized an electrophysiological technique to estimate the relative time course of semantic and phonological processing, which were indexed by lateralized readiness potential (LRP; related to response preparation) and N200 (related to response inhibition). Participants were shown pictures and carried out a dual-choice go/no-go decision based on semantic information (whether the picture was of a living or non-living object) and phonological information (based on the end phoneme of the picture’s name). Both LRP and N200 indicated that semantic processing was prior to phonological processing, favoring a serial or cascaded model in Chinese production.