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Imitation during phoneme production.

Maurizio Gentilucci1, Paolo Bernardis

  • 1Dipartimento di Neuroscienze, Università di Parma, Via Volturno 39, 43100 Parma, Italy. gentiluc@unipr.it

Neuropsychologia
|May 16, 2006
PubMed
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People unconsciously imitate speech features like lip movements and voice spectra when listening to and watching others speak. This automatic imitation suggests a close interaction tendency between interlocutors.

Area of Science:

  • Speech production
  • Phonetics
  • Cognitive neuroscience

Background:

  • The influence of auditory and visual speech cues on phoneme production is not fully understood.
  • Imitation plays a role in social interaction and learning, but its automaticity in speech is debated.

Purpose of the Study:

  • To investigate whether observing and listening to an interlocutor influences phoneme production.
  • To determine if participants automatically imitate lip kinematics and voice spectra during speech repetition.

Main Methods:

  • Two experiments were conducted with female participants repeating the phoneme string /aba/.
  • Stimuli were presented visually, acoustically, and audiovisually by male and female actors.
  • Lip kinematics and voice spectra of participants' productions were analyzed and compared to control conditions.

Related Experiment Videos

Main Results:

  • Participants' lip kinematics and voice spectra shifted towards the male actor's speech characteristics when presented visually and acoustically, respectively.
  • Visual presentation of speech also induced changes in voice formants.
  • These changes suggest automatic imitation of observed and heard speech features.

Conclusions:

  • Both visual and auditory speech cues can trigger automatic imitation of an interlocutor's lip kinematics and voice spectra.
  • This imitation reflects an unconscious tendency for close interaction, potentially mediated by the mirror system.
  • Speech perception and production are closely linked, with imitation serving as a fundamental interactive mechanism.