This dissertation aims to extend our knowledge of prosody--in particular, what kinds of information may be conveyed through prosody, which prosodic dimensions may be used to convey them, and how individual speakers differ from one another in how they use prosody. Four production studies were conducted to examine how various factors interact with…

This dissertation describes the segments and tones of Soyaltepec Mazatec, an Oto-Manguean language of southern Mexico virtually undescribed in the literature with the exception of Pike (1956). The preliminary work done by Pike and subsequent analyses by Goldsmith (1990) and Pizer (1994) are reviewed giving evidence that the system is complex and…

First language (L1) attrition research focuses on syntactic and morphological deterioration in environments where L1 "attriters" rarely have contact with their L1, such as immigrants. There is no study that investigates L1 attrition in tones and in contexts where L1 can still be often heard. This study examines this attrition type in…

Lexical-tone languages use fundamental frequency (F0/pitch) to convey word meaning. About 41.8% of the world's languages use lexical tone (Maddieson, 2008), yet those systems are under-studied. I aim to increase our understanding of speech-sound inventory organization by extending to tone-systems a model of vowel-system organization, the Theory of…