Duffy (2013) defines speech intelligibility as the “degree of accuracy with which a listener recovers the acoustic signal or message produced by a speaker.” Kent (1992) considers intelligibility as the paramount issue in speech pathology, “the behavioral standard of communication.”
Speech intelligibility can be severely reduced in Parkinson’s disease (PD); it can be among the main concerns of people with PD (Miller et al., 2007). The validity and reliability in assessing speech intelligibility in PD may be affected by several factors.
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