本研究使用腦事件相關電位(ERP)的實驗，檢驗台灣閩南語次方言趨同現象的心理真實性。實驗共包含陽平變調和i、u對應等七種具有漳泉對應關係的聲調和韻母，以圖片促發受試者的預期語音，並操弄漳音、泉音和與圖片無關的語音作為目標語音，觀察反應時間與PMN振幅來推論各類型的語音變異情況，結果發現母語為偏漳腔的受試者語音沒有變異。不過，母語為偏泉腔的受試者則有以下三種情形：
（1）聽到泉音的反應時間較快，且泉音的振幅比漳音小，如ionn、iunn對應這一類型。
（2）聽到泉音的反應時間與漳音差不多，且漳音和泉音的振幅幾乎重疊，如陽平變調類型和i、u對應類型等。
（3）聽到漳音的反應時間較快，且漳音的振幅低於泉音的振幅，如陰上變調類型。
實驗結果證明偏泉腔各類型變化的速度和方向不同。在陰上變調變化最快，而ionn、iunn對應類型則最牢固，甚至在競爭中取得優勢。此外，以漳音的振幅幾乎等於泉音的振幅的情形佔大部分，表示對以偏泉腔為母語的人來說，偏泉腔並沒有完全消失，而是和偏漳腔以共存的方式儲存在大腦中，這與方言調查的結果有出入。
最後，本文認為語音變化是受到語音生活經驗的影響，語音生活經驗豐富的人，心理詞彙庫是漳、泉並存的，偏漳、偏泉的振幅便會很接近 。而語音生活經驗比較封閉的人，心理詞彙庫大多只有一種語音，當他聽到不同於自己腔調的語音時，便會產生很大的振幅。

The study investigates how the speakers process different dialects in Taiwanese by using Event-related Potential（ERP）. The experiment manipulates seven conditions containing corresponding differences between Chang-chou and Chhuan-chou dialects in Taiwanese. The picture is shown to the subjects as a prime and induce their expected word. Then a auditorily presented word is played to the subjects a target. There are three conditions manipulated for the target: Chang-chou variant for the picture shown as the prime, Chhuan-chou variant for the picture shown as the prime, and a word which does not match the prime. The subjects reaction time and PMN amplitude are measured.
The results show that the native speakers of Chang-chou dialect rarely change their native accent, but the native speakers of Chhuan-chou dialect do. Their behaviors show the following three patterns:
（1） Compared with Chang-chou variants, when the subjects heard Chhuan-chou sounds, their reaction time becomes shorter and their PMN amplitude becomes lower, as in the conditions of ionn and iunn.
（2）No differences are found in the reaction time or PMN amplitude in hearing Chang-chou and Chhuan-chou correspondents, as in the conditions of i and u.
（3）Compared with Chang-chou variants, when the subjects heard Chhuan-chou sounds, their reaction time becomes longer and their PMN amplitude becomes larger, as in the tone sandhi condition of Shang.
In summary, these results suggest that the changing stage from Chhuan-chou dialect to the Chang-chou dialect is not the same in the seven conditions. For most of the cases, no differences are found in the reaction time or PMN amplitude in hearing Chang-chou and Chhuan-chou correspondents. This indicates that the two variants are competing and that the Chhuan-chou variants are psychologically real to the subjects, even though many of the Chhuan-chou variants are not found in the production data collected by field methods.
Finally, we suggest that the exposures of hearing other dialects in daily lives can affect the process and mechanism of phonetic recognition

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