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Related Experiment Videos

Variations in articulatory movement with changes in speech task.

Stephen M Tasko1, Michael D McClean

  • 1Department of Speech Pathology and Audiology, Western Michigan University, Kalamazoo, MI 49008, USA. Stephen.tasko@wmich.edu

Journal of Speech, Language, and Hearing Research : JSLHR
|April 10, 2004
PubMed
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Speech tasks significantly impact articulatory movements. Nonsense phrases, unlike sentences or monologues, showed larger, faster, and longer movements in healthy males, suggesting task variation is crucial for studying speech motor behavior.

Area of Science:

  • Speech Science
  • Motor Control
  • Linguistics

Background:

  • Articulatory movement studies often use simple speech tasks.
  • Speech disorder severity can vary significantly with the speaking task.
  • Understanding task variations is key to understanding normal and disordered speech motor behavior.

Purpose of the Study:

  • To evaluate how orofacial kinematic behavior changes across different speaking tasks.
  • To investigate the influence of rate and intensity variations on articulatory kinematics.
  • To analyze task-related differences in movement features and spatial variability.

Main Methods:

  • Fifteen healthy male speakers participated.
  • Speech tasks included nonsense phrases, sentences, oral reading, and monologues.

Related Experiment Videos

  • Upper lip, lower lip, tongue blade, and mandible positions were recorded.
  • Movement features (peak speed, distance, duration) and spatial variability were analyzed.

    • Main Results:

    • Nonsense speech tasks resulted in larger, faster, and longer movement strokes compared to other tasks.
    • Task-related differences in spatial variability were observed for the lower lip and tongue.
    • Loudness and rate changes affected kinematic measures, with complex interactions based on articulator and task.

    Conclusions:

    • Speech kinematic behavior differs significantly across various speaking tasks and conditions.
    • The findings highlight the importance of using diverse speech tasks to study speech motor behavior.
    • Expanded task and condition ranges may improve the understanding of normal and disordered speech.