Sync Pending: Characterizing Conversational Entrainment in Dysarthria Using a Multidimensional, Clinically Informed...

Area of Science:

• Speech Pathology
• Acoustic Phonetics
• Computational Linguistics

Background:

• Conversational entrainment, the behavioral syncing in spoken dialogue, is crucial for successful communication.
• Systematic characterization of entrainment in speech pathology, particularly in dysarthria, remains underexplored.
• Previous research validated multidimensional acoustic approaches for entrainment in healthy conversations.

Purpose of the Study:

• To acoustically characterize conversational entrainment in individuals with dysarthria.
• To compare entrainment patterns in dysarthric versus healthy conversations.
• To examine the relationship between conversational entrainment and communicative efficiency.

Main Methods:

• Elicited goal-oriented conversations between participants with and without dysarthria using a 'spot the difference' task.
• Employed cross-recurrence quantification analysis to assess acoustic entrainment across rhythmic, articulatory, and phonatory dimensions.
• Utilized expert clinical assessment for entrainment and communicative efficiency, validated against a sham condition.

Main Results:

• Acoustic entrainment was observed in phonatory, but not rhythmic or articulatory, dimensions for dysarthric conversations.
• Disordered conversations exhibited significantly less acoustic entrainment compared to healthy conversations.
• Acoustic entrainment was a significant predictor of communicative efficiency, aligning with clinical assessments.

Conclusions:

• Pathological speech production in dysarthria disrupts conversational entrainment, impacting communication success.
• Entrainment deficits represent a key variable in dysarthria, potentially causing everyday communication difficulties.
• Methodologies for characterizing entrainment in dysarthria require further refinement for clinical utility.