本文主要是探討泰雅方言母音加插與重疊詞這兩個議題，並且利用優選理論比較母音加插與重疊詞之間的關聯性。本研究的方言區域範圍包括新竹縣尖石鄉新樂村之賽考列克方言、新竹縣尖石鄉梅花村之泰雅方言、以及苗栗縣泰安鄉大興村之澤敖利方言。除了實地田野調查收集不同方言語料之呈現，研究方法以優選理論為主，進而分析上述方言異同之處。

本文主張泰雅方言主要以母音加插分析來避免表面的子音群，並且允許在重疊詞中母音加插。在賽考列克方言的泰雅方言中，加插的母音為schwa，而本文之澤敖利方言加插的母音為 [a] 。由語料的呈現、音節型態與劃分、重疊後音節之展現中，母音加插分析是很重要的角色。雖然部分語料有加綴後母音弱化的過程，表面母音加插分析以避免子音群更能充分詮釋泰雅語音節型態與音節劃分。此外，不同泰雅方言之加插的母音亦影響到重疊之後表面的音節型態。

在重疊詞這個議題中，作者將重疊詞依不同詞類做語意簡述和語音型態之分類。作者觀察到母音加插之數目與不同泰雅方言的重疊手段有著密切的互動，歸納出音節有標制約的影響以及詞中韻尾的轉換。在前兩者的泰雅方言中，第二種的部分重疊詞裡捕捉到的特色為，第二個子音有出現的限制分布。本文以非樣板制約與非樣板理論為主，加上與母音加插之制約的互動預測出重疊之後的音節型態與正確值。

最後，在本文後半部份提出不同方言重疊詞之比較研究，以及未來研究之相關議題，更多的不同泰雅方言上的差異值得去思索以便證明母音加插之重要性與動機。

This thesis investigates phoneme inventory, syllable structures, reduplication patterns, and the interaction between the epenthetic vowels and reduplication in Maraqwang, Maklabay, and Matabalay. The goal of this thesis is to show that vowel epenthesis analysis is our main phonological strategy to avoid consonant cluster onsets in the surface forms to deal with partial reduplication and to form the accurate reduplication patterns in Atayal dialects. CV syllables are preferred in non-final position in Maraqwang. As for Maklabay and Matabalay, CVC syllables are preferred in non-final positions.

The main objective to discuss reduplication is to use the framework of Optimality Theory (OT), as formulated by McCarthy and Prince (1995), Kager (1999), etc., to show that we do not need to have templatic constraints to limit the shape of the reduplicant (Gafos 1998). Our study reveals that ALIGNSEG constraints (Crowhurst 2004) are applied and we use constraint rankings to analyze the interaction of vowel epenthesis and reduplication in Atayal dialects.

Concerning reduplication in Atayal dialects, we codify them as prefixing reduplication. In Atayal dialects, meanings and forms of reduplication and reduplicative patterns are our main focuses. Total reduplication, C reduplication, CC reduplication are examined in the three Atayal dialects. In Maraqwang and Maklabay, there are three main reduplicative patterns: total reduplication, C reduplication, and CC reduplication. However, these two dialects choose different strategy in word-internal codas with schwas in the nucleus for syllabification with CC reduplication. Instead of adding an epenthetic vowel as schwa, Matabalay uses the low vowel [a] to avoid consonant clusters in syllabification. C reduplication with vowel [a] epenthesis is productive in Matabalay.

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