Brief Report: Quantifying Speech Production Coordination from Non- and Minimally-Speaking Individuals

Area of Science:

• Speech-language pathology
• Communication sciences
• Bioacoustics

Background:

• Non-verbal utterances are crucial for communication in non- or minimally-speaking individuals.
• Interpretation of these vocalizations by the wider community remains a challenge.
• Limited research exists on detecting and characterizing these specific vocalizations.

Purpose of the Study:

• To characterize five distinct categories of non-verbal utterances.
• To analyze vocalizations from seven non- or minimally-speaking individuals.
• To identify patterns in speech production systems for different utterance types.

Main Methods:

• Utilized a correlation structure methodology to assess motor coordination.
• Applied this method to analyze similarities and differences in speech production systems.
• Examined coordination complexity across articulatory, respiratory, and laryngeal subsystems.

Main Results:

• Frustrated and dysregulated utterances exhibited similar correlation structures, distinct from self-talk, requests, and delighted utterances.
• Frustration and dysregulation showed increased articulatory-respiratory coordination complexity and decreased laryngeal-respiratory coordination complexity.
• Request utterances displayed lower overall coordination complexity across all three subsystems compared to self-talk and delight.

Conclusions:

• This research provides insights into vocalization modifications for non-verbal communication goals.
• Understanding these patterns can improve communication accessibility for non- or minimally-speaking individuals.
• The findings contribute to characterizing the nuances of non-verbal communication in specific populations.