Is Phonology Embodied? Evidence from Mechanical Stimulation.

Area of Science:

• Psycholinguistics
• Speech Perception
• Motor Control

Background:

• Systematic preferences for certain syllable structures exist across languages.
• The motor simulation account proposes that ill-formed syllables are dispreferred due to motor planning difficulties.

Purpose of the Study:

• To investigate whether syllable structure preferences in speech perception stem from motor simulation.
• To determine if motor stimulation differentially affects the perception of labial- vs. coronal-initial speech sounds.
• To explore the relationship between embodied phonetics and abstract phonology.

Main Methods:

• Four experiments were conducted comparing sensitivity to syllable structures in labial- and coronal-initial speech stimuli.
• Participants (English and Russian speakers) engaged in light lip or tongue biting during stimulus presentation.
• Motor stimulation effects on speech perception were analyzed.

Main Results:

• Perception of speech stimuli was selectively modulated by motor stimulation, with differential effects on labial vs. coronal stimuli.
• Motor stimulation did not alter sensitivity to syllable structure.
• A dissociation was observed between phonetic perception (embodied) and phonological processing (abstract).

Conclusions:

• Phonetic aspects of speech perception appear to rely on motor simulation, supporting an embodied view.
• Phonological processing, however, may be abstract and independent of motor simulation.
• These findings highlight the separation between phonetics and phonology within the language system.