This dissertation investigates how the abstract representation of vowels affects spoken word recognition in Brazilian Portuguese and American English by examining two issues in theoretical phonology and speech processing: underspecification theory, and underlying representation when there is alternation. Three experiments were conducted in…

This dissertation examines the associations between pragmatic meaning categories in English and specific realizations of prosodic prominence. It has been well-established that in Mainstream American English (MAE), prominence is often used to convey contrast. A more limited set of studies suggests that prosodic prominence may also be capable of…

This study investigates the effects of native language experience and phonetic properties on the discrimination of labial-velar versus labial and velar contrasts, as well as voicing contrasts in labials, velars, and labial-velars. Research indicates that phonological perceptions are influenced by native language experience and the specific…

The perception and encoding of voice cues in consonants have been well studied, whereas there has been relatively little research on aspiration. The current study examined the encoding and perception of aspiration and voicing in Hindi, American English, and Tamil listeners when relevant cues were and were not degraded by noise. This study is novel…

This dissertation investigates language-specific acoustic and aerodynamic phenomena in language contact situations. Whereas most work on second language and bilingual phonology has focused on individual consonants and vowels, this project examines patterns of coarticulation in the two languages of Spanish-English and French-English bilingual…

This dissertation presents three studies that examined issues related to the production and the perception of pitch in a tone language. The first study examined linguistic contexts that may modulate consonant-induced pitch perturbations (CF0) in a tone language. Previous studies have produced mixed findings regarding the role of linguistic…

Recent research reveals that pronunciation converges in verbal interaction (Babel, 2012), but this varies between speakers (Pardo, 2006). Based on dynamical principles I predict differences in bilinguals' accommodation towards English voice-onset-time (VOT). VOT is a phase relation between two articulatory gestures measuring the time between oral…

Palatalization refers to a type of coarticulation in which the place of articulation of some sound is closer to the palate than otherwise expected, very often triggered by adjacent palatal segments. It has been known as one of the most dynamic phonological phenomena in phonetic and phonological research, but the articulatory nature of…

This dissertation explores the phonetic mechanisms of the sound change known as rhotacism (/s/ greater than /z/ greater than /r/) which is observed in Italic, Germanic, and Sanskrit, among other languages, employing lab-based methods of "experimental historical phonology" (Ohala 1974), and approaching sound change from the theoretical standpoint…

Studies of connected speech have repeatedly shown that the contextual predictability of a word is related to its phonetic duration; more predictable words tend to be produced with shorter duration, when other factors are controlled for (Aylett & Turk, 2004, 2006; Bell et al., 2003; Bell, Brenier, Gregory, Girand, & Jurafsky, 2009; Gahl,…

Debuccalization is a weakening phenomenon whereby various consonants reduce to laryngeals. Examples include Spanish s-aspiration (s becomes h word-finally) and English t-glottalization (t becomes glottal stop syllable-finally). Previous analyses of debuccalization view it as a lenition process that deletes or manipulates formal phonological…

This dissertation investigates whether people possess knowledge of fine-grained distinctions among the sonority levels that are unattested in their language. Specifically, I investigate the whether people encode the putatively universal distinction between the sonority levels of fricatives and stops. Across languages, fricatives and stops differ…

Purpose: The purpose of this study was to determine which instructional strategies elementary school principals and fourth-grade teachers perceive substantially support the development of Standard English language skills and reading proficiency in African American students. Methodology: The study used a descriptive case study. The findings were…