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Related Experiment Videos

Covert speech behavior during a silent language recitation task

J Livesay1, A Liebke, M Samaras

  • 1School of Psychology, California Institute for Human Science, Encinitas 92024, USA.

Perceptual and Motor Skills
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Silent speech, or covert verbal behavior, is more pronounced during silent language recitation than during visualization tasks. Electromyography (EMG) confirmed increased lip muscle activity during silent recitation.

Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Human Physiology

Background:

  • Covert speech, or inner speech, is a cognitive process involving subvocalization.
  • Understanding the physiological correlates of covert speech is crucial for cognitive science.

Purpose of the Study:

  • To investigate whether covert speech behavior is more prominent during silent language recitation compared to nonlanguage visualization.
  • To measure electromyographic (EMG) activity of lip muscles during these tasks.

Main Methods:

  • Utilized a multiple-baseline reversal design (ABAB) with 20 healthy adult volunteers.
  • Measured electromyography (EMG) from dorsal lips and forearm, skin surface temperature, and heart rate.
  • Tasks included silent recitation of the Pledge of Allegiance and mental visualization of the American flag.

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Main Results:

  • Mean lip EMG activity significantly increased from rest to the silent-language recitation task.
  • No significant change in mean lip EMG was observed from rest to the visualization condition.
  • Forearm EMG, skin temperature, and heart rate did not show significant changes across conditions.

Conclusions:

  • Silent language recitation elicits measurable covert speech behavior, indicated by increased lip muscle activity.
  • Mental visualization does not appear to engage the same covert speech mechanisms.
  • EMG is a viable tool for detecting subtle physiological changes associated with inner speech.