This dissertation had two purposes: (1) to create and document the development of a new music achievement test entitled the Musical Discrimination and Styles Task (MDAST), and (2) to describe the strength of the evidence supporting the validity and reliability of this new developmentally appropriate music aptitude and achievement instrument. I…

The Hindi consonant inventory, which includes the cross-linguistically rare retroflex place of articulation and four-way laryngeal contrasts, is known to pose difficulties for native English speakers. Hindi language textbooks address this challenge, in part, by providing various articulatory and acoustic descriptions of Hindi consonants, typically…

Purpose: Speech perception in noise becomes difficult with age but can be facilitated by audiovisual (AV) speech cues and sentence context in healthy older adults. However, individuals with Alzheimer's disease (AD) may present with deficits in AV integration, potentially limiting the extent to which they can benefit from AV cues. This study…

Purpose: The purpose of the present study was to evaluate the new Cognitive Spare Capacity Test (CSCT), which measures aspects of working memory capacity for heard speech in the audiovisual and auditory-only modalities of presentation. Method: In Experiment 1, 20 young adults with normal hearing performed the CSCT and an independent battery of…

Purpose: The purpose of this study was to examine sentence-recognition performance for a large, diverse group of nonnative speakers of English on the recently developed Basic English Lexicon (BEL) sentence materials and to determine whether BEL sentence lists are equated in difficulty for this population. Method: The BEL sentences were presented…

Purpose: To study the perceptual consequences of changes in parameters of vocoded speech in various reverberation conditions. Method: The 3 controlled variables were number of vocoder bands, instantaneous frequency change rate, and reverberation conditions. The effects were quantified in terms of (a) nonsense words' recognition scores for young…

What is second language fluency? What is a foreign accent? Is it possible for an adult second language learner to speak fluently with a heavy accent or vice versa? What factors contribute to the perception of fluency and a foreign accent? What acoustic attributes correlate with the perception of fluency and a foreign accent? To answer these…

It was hypothesized that individuals who can easily detect differences in the timbre of tone would be more likely to appreciate musical instruments with more complex sound waves, and that the degree of this tendency would be directly proportional to the length of time one has played the instrument. (Authors)

Applied to the recognition of words in noise, the theory of the perceptual identification of complex stimuli provides a quantitative account of the proportions in which correct and erroneous responses of different frequencies will occur. (Author)