This study is the third in a series that has explored the source of intelligibility decrement in dysarthria by jointly considering signal characteristics and the cognitive-perceptual processes employed by listeners. A paradigm of lexical boundary error analysis was used to examine this interface by manipulating listener constraints with a brief familiarization procedure. If familiarization allo...

BACKGROUND Friedreich's ataxia is one of the most common hereditary disorders of the nervous system. Dysarthria is a pervasive symptom of Friedreich's ataxia, yet the clinical presentation of speech symptoms remains poorly understood, leaving clinicians without the evidence required to develop therapy interventions. AIMS The research reported herein had three aims: the first was to document t...

PURPOSE To compare the speech and voice of Parkinson's disease (PD) patients and neurologically healthy elderly adults (control group, CG), to find out whether these features are related to the disease or the normal aging process, and investigate the impact that dysarthria has on the Quality of Life (QoL) of these individuals. METHODS This is a cross-sectional study involving 25 individuals, ...

OBJECTIVES To identify corticobulbar tract changes that may predict chronic dysarthria in young people who have sustained a traumatic brain injury (TBI) in childhood using diffusion MRI tractography. METHODS We collected diffusion-weighted MRI data from 49 participants. We compared 17 young people (mean age 17 years, 10 months; on average 8 years postinjury) with chronic dysarthria who sustai...

This study reports on the development of an automated isolated-word intelligibility metric system designed to improve the scoring consistency and reliability of the Frenchay Dysarthria Assessment Test (FDA).The proposed intelligibility measurements are based on the probabilistic likelihood scores derived from the forced alignment of the dysarthric speech to whole-word hidden Markov models (HMMs...