A fundamental issue in speech science concerns the extent to which speech sounds are mentally represented by articulatory-motor and/or auditory-acoustic features. This dissertation aims to expand upon the current literature by investigating changes in production and perception following visual feedback training with either articulatory or acoustic…

Where native speakers supposedly are fluent by default, nonnative speakers often have to strive hard to achieve a nativelike fluency level. However, disfluencies (such as pauses, fillers, repairs, etc.) occur in both native and nonnative speech and it is as yet unclear how fluency raters weigh the fluency characteristics of native and nonnative…

Previous Language Testing research has largely reported that although many raters' characteristics affect their evaluations of language assessments (Reed & Cohen, 2001), being a native speaker or non-native speaker rater does not significantly affect final ratings (Kim, 2009). In Second Language Acquisition, some researchers conclude that…