目的：观察以西班牙语为母语的墨西哥汉语习得者在感知汉语送气和不送气塞音、塞擦音时的脑偏侧化。方法以19例视力、听力均正常及非左利手的墨西哥籍汉语习得者为研究对象，应用两耳分听技术分别测试其识别普通话送气和不送气塞音、塞擦音时的脑半球反应时间。结果学习汉语语音25～30小时的墨西哥汉语习得者识别普通话送气、不送气塞音和塞擦音时，左耳（大脑右半球）和右耳（大脑左半球）的正确反应时间差异无显著统计学意义；学习汉语语音50～60小时的墨西哥汉语习得者识别送气塞擦音的左耳（大脑右半球）正确反应时间显著低于右耳（大脑左半球）（ P＜0．05）；识别不送气塞擦音的左耳（大脑右半球）正确反应时间显著低于右耳（大脑左半球）（ P＜0．05）。结论墨西哥汉语习得者汉语送气和不送气音的脑偏侧化的程度是一个渐变的过程，该过程与汉语习得者送气和不送气语音范畴的建立有关。%Objective To investigate the relationship between the advantage ear (brain hemisphere) of Span-ish-speaking Mexican Chinese learners and category's perception of the Chinese aspirated and unaspirated pho-nemes .Methods Chinese aspirated and unaspirated syllables were used as experimental materials with dichotic lis-tening technology to test the Spanish -speaking Mexican Chinese learners .Results Mexican Chinese learners had studied Chinese 25~30 hours firstly showed percept unaspirated affricates and aspirated stops didn't appear left and right ear advantage .Mexican Chinese learners had studied Chinese 50~60 hours showed that percept aspirated affri-cates appeared right ear advantage(P<0 .05) ,and percept unaspirated affricates appeared left ear advantage (P<0 . 05) .Conclusion The conformation of Mexican Chinese learners’ advantage ear (brain hemisphere) is a continuous process ,relating to Chinese aspirated and unaspirated’s category building .
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