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  11. Electrophysiological And Behavioural Responses To Consonant And Dissonant Piano Chords As Standardised Affective Stimuli.

Electrophysiological and behavioural responses to consonant and dissonant piano chords as standardised affective stimuli.

Alexander Kirsanov1, Maria Koriakina2, Denis Panasenko1

  • 1Laboratory of Behavioural Neurodynamics, Saint-Petersburg State University, Saint-Petersburg, Russia.

Frontiers in Human Neuroscience
|November 14, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Consonant and dissonant piano chords elicit distinct emotional and brain responses. This study reveals their potential as standardized affective stimuli in neuroscience research for understanding emotional processing.

Area of Science:

  • Neuroscience
  • Psychoacoustics
  • Cognitive Science

Background:

  • The distinction between consonance and dissonance has long intrigued scientists.
  • Isolated chords remain underutilized as standardized affective stimuli in neuroscience.

Purpose of the Study:

  • To investigate whether consonant, dissonant, and neutral piano chords evoke differential subjective and neurophysiological emotional responses.
  • To explore the utility of isolated chords as standardized affective stimuli.

Main Methods:

  • Combined behavioral assessments, electroencephalography (EEG) recordings, event-related potentials (ERPs), frequency-domain analysis, and source analysis.
  • 30 participants rated the valence of consonant, dissonant, and neutral piano chords during EEG recording.

Main Results:

Keywords:
DFAERPLRTCaffective stimuli

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  • Behaviorally, a clear valence gradient was observed: consonance was pleasant, dissonance unpleasant, and neutral stimuli were neutral.
  • ERPs showed distinct responses in specific time windows (90-110 ms, 190-210 ms, 290-310 ms) and activated frontotemporal/temporoparietal areas for dissonant chords.
  • EEG frequency and neurodynamic indices (gamma/beta bands, LRTC) indicated that classification accuracy depended on chord type and EEG characteristics for dissonant and neutral stimuli.

Conclusions:

  • Isolated chords demonstrably evoke differentiated emotional and cognitive responses.
  • These findings support the potential of using isolated chords as effective affective stimuli in future neuroscience research.
chords
source analysis