Intonation contrast in Cantonese speakers with hypokinetic dysarthria associated with Parkinson's disease.

Purpose: Speech produced by individuals with hypokinetic dysarthria associated with Parkinson's disease (PD) is characterized by a number of features including impaired speech prosody. The purpose of this study was to investigate intonation contrasts produced by this group of speakers.

Method: Speech materials with a question-statement contrast were collected from 14 Cantonese speakers with PD.