A multidimensional examination of vowel-related articulatory deficits in Parkinson’s disease

• DOI: 10.31219/osf.io/ymejz
• Publication Date: 2024-03-02T05:01:12Z
• Authors: Austin Thompson; Yunjung Kim

Purpose: This study aimed to investigate the perceptual, acoustic, and kinematic differences between speakers with without dysarthria due Parkinson’s disease (PD) across conversational, less clear, more clear clarity conditions.Methods: Forty participants, including 22 PD 18 controls, read three phrases aloud using speaking conditions. Acoustic measures were obtained from diphthong /aɪ/ selected vowels in sentences. A total of 368 listeners crowdsourcing provided ratings for intelligibility articulatory precision. Linear mixed-effects models employed examine (1) baseline conversational speaker group measures, (2) clarity-related changes measures.Results: In condition, perceived as intelligible precise. However, none acoustic or differed PD. When asked modify clarity, both groups successfully modified various resulting perceptual showed a reduced magnitude change compared HC speakers.Conclusions: The findings generally support efficacy speech behavioral treatment cue. also highlight large variability strategies by their clarity.