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Related Experiment Video

Updated: Sep 13, 2025

Author Spotlight: Investigating Vocal Information Representation in Small Primates and Its Alteration by Psychiatric Disorders Using Noninvasive EEG
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Speaker differences in volitional voice modulation reflected in empathy and functional activation patterns.

Stella Guldner1,2, Frauke Nees3, Herta Flor2

  • 1Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany.

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|July 28, 2025
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Summary
This summary is machine-generated.

Individuals can strategically control their voice to convey social traits like likeability. This vocal control involves specific brain regions and is influenced by empathy and Machiavellianism.

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Area of Science:

  • Neuroscience
  • Psychology
  • Speech Science

Background:

  • Vocal modulation is key for self-expression and social impression management.
  • Individual differences in social reactivity may influence vocal control abilities.

Purpose of the Study:

  • Investigate individual differences in social vocal control performance.
  • Examine the relationship between vocal control, social reactivity, and neural mechanisms.
  • Determine how psychological traits influence the ability to modulate voice for social signaling.

Main Methods:

  • Twenty-four participants modulated their voice to express social traits (likeable, hostile, intelligent) during functional magnetic resonance imaging (fMRI).
  • Vocal control performance was measured by the specificity of trait evocation in naïve listeners.
  • Participants completed self-report questionnaires assessing empathy, psychopathic, and Machiavellian traits.

Main Results:

  • Social vocal control performance correlated with activation in brain areas for vocal motor and social processing (e.g., posterior TPJ, SMG, premotor cortex).
  • Cognitive empathy predicted general vocal performance.
  • Machiavellianism specifically predicted better performance in conveying likeability.

Conclusions:

  • Strategic social voice modulation involves a network of vocal control and social processing brain regions.
  • Psychological factors, including empathy and Machiavellianism, play a role in the ability to strategically control vocal expression for social purposes.