本研究旨在探討遵行英語指南將國語語料中幼兒早期發音音節用傳統轉寫以外的方法做分類的可行性，以及尋覓測量幼兒4到12月大語言發展的趨勢及變化可採用的方法、準則、或工具。八位幼兒的語料以錄音的方式紀錄自然發音，所採用的月份數從4到12個月每月一捲音檔，並將所有可辨識的發音加以分析。根據Fagan在2005年所發表的測量方式，其中有六項參數包括在本次的研究中:發音時間長度、平均發音數、平均發音速度、非喉音子音數、平均音節數、重複音數。除此之外，幼兒發音的組成內容也做數據統計分析(比如單一音節數、單一母音數、詞彙數…等)，以利更精確了解各時期的語言發展變化。結果顯示: 1. 使用自然轉寫的方法取代傳統國際語音標示法分類幼兒早期的發音適用於國語語料中。2. 六項變數及其他組成內容在子音母音組合音節出現此階段的前後皆有明顯的變化。3. 統計結果顯示六項變數之間的相互作用有顯著性影響，然而，六項變數的變化與階段性成長的相互關聯並無顯著影響。本研究印證了子音母音組合音節在語言發展中佔了一個重要分水嶺的位置；未來更須針對此一階段性的語言變化指標規劃出更精確的測量方法及更簡明的語料標示準則。

The goal of this study is to apply the naturalistic way of justifying early infant speech to Mandarin Chinese data based on English guidelines, and to seek the possible method, principle, or tool for measuring the changes and trends of speech in the developmental process from 4 to 12 months of age. The data was randomly chosen from a large database of longitudinal study, including 8 infant participants. The infant natural speech was collected through recording twice every month. All the recordings went through preliminary selection, and one of the audiotapes was chosen per 2-month intervals from 4 to 12 months old. Moreover, all intelligible utterances were coded as certain vocalization types for further analysis. Six parameters are applied from Fagan (2005) to analyze early vocalizations: temporal duration, number of sounds per utterance, number of seconds per sound, number of supra-glottal consonants, number of syllables and number of repetitions. In addition, the study explores the components of infant speech utterances (number of single syllable, number of single vowel, number of word production, etc.) by statistical analysis. Major findings in this study are: (a) the naturalistic way of identifying infant vocalization instead of traditional transcription is suitable for Mandarin-speaking data collected from three developmental stages: pre-babbling (PreCB), canonical babbling (CB), and post-babbling (PostCB); (b) the changes of the characteristics of infant vocalization show a significant progress during canonical babbling period; (c) through Pearson Correlation Analysis from SPSS, the statistics show that six parameters present significant correlation with each other. Furthermore, the correlation between six parameters and three developmental stages are significant at CB and PostCB stages except number of seconds per sound. The present study suggests that canonical babbling stage plays a dominant role as the watershed during infant speech development. For future study, to seek a more precise measurement and a more natural way of data representation at CB stage is a must.

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