中文摘要
本篇研究自探討國內、外對聽覺詞彙的行為研究、腦技術研究開始，為三類閩南語變調可能的腦處理方式建立起表徵運作模型，接著使用ERP為實驗工具，操弄聲調及語意因子，以聽覺詞彙促發的方式，檢驗各運作模型的可行性。實驗分析N400表現的結果，變調單音節詞彙對於變調雙音節詞彙的實驗配對促發具有明顯的促進效果（facilitating effect），而本調單音節詞促發本調雙音節詞的N400表現與本調單音節詞促發變調雙音節詞的結果不一致，這兩項證據支持閩南語變調具有心理真實性的主張。此外，由語意處理成份N400出現的時間點，皆位於雙音節目標詞的第二音節起始後約300~500ms之間，以及第一音節裡持續延長的注意波中發現，我們的實驗結果證明以「雙音節全詞」為單一詞彙表徵處理對象的腦理解方式，亦即主張，對於閩南語連讀變調雙音節詞彙，受話者腦中採取延遲處理的方式──等待足夠訊息進入，才開始語意的整合處理。
　　此外，閩南語本調和變調之間仍存在著聲調轉換機制，但聲調轉換具有聯結方向性，更進一步的，這個超音段聲調特徵在語音刺激初始約200ms處即可被隱約辨識，至300ms處可完全辨識。最後，本研究支持N400成份包含了初階語音分析及次階語意處理的雙相假設。

Abstract
A debate in Southern-Min language tone sandhi is what derived by rule or stored in mental. No studies have ever tried to demonstrate the nature of the issue with evidences in neurophysiology. We approach the issue by analyzing the records of Event-related brain potentials (ERP) in spoken word priming paradigm of 16 Taiwaneses. Our results elucidate the psychological processes that underlie the N400 component suggest the psychological reality of Southern-Min language tone sandhi and, in line with model of tone snadhi processing which assume that a dual-syllable whole word is a treatment unit during semantic comprehensive processing.

Processing of tone sandhi in sentential context aside, however, for assignments, there still an unidirectional transform mechanism is working. Another, analysis of RP (recognition potential) shows that the minimum duration signal necessary to discriminate tone value of a spoken word is about 200ms after onset of stimuli, identified up to 300ms.

After all, the implication of our results for the linguistic processes underlying the N400 is biphasic, not only associated with lexical access ( pre-lexical phonological analysis stage) but also post-lexical integration processes.

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