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Despite the importance of speech naturalness to treatment outcomes, little research has been done on what constitutes speech naturalness and how to best maximize naturalness in relationship to other treatment goals like intelligibility. In addition, previous literature alludes to the relationship between prosodic aspects of speech and speech naturalness, but little is known about what specific aspects of prosody relate to naturalness. This study examines acoustic correlates of prosody in the speech of individuals with dysarthria and the relationship of these correlates with speech naturalness ratings.