Effects of global and local contexts on chord processing: An ERP study

Area of Science:

• Cognitive Neuroscience
• Music Psychology
• Auditory Perception

Background:

• Real-world event processing is continuously shaped by prior information across various timescales.
• Understanding how musical context influences auditory perception is crucial for cognitive science.

Purpose of the Study:

• To investigate the influence of local and global harmonic contexts on the processing of incoming musical chords.
• To examine the temporal dynamics of contextual effects in music perception using event-related potentials.

Main Methods:

• Event-related potentials (ERPs) were recorded from musically trained listeners.
• Participants listened to chord sequences with varying harmonic relationships at local and global levels.
• Analysis focused on electrophysiological responses to the final critical chord in each sequence.

Main Results:

• An early ERP effect, similar to the Early Right Anterior Negativity (ERAN), was observed for local harmonic context.
• A later component, resembling the N5 wave, reflected the interaction between local and global harmonic contexts.
• Local harmonic context influenced processing earlier than global harmonic context.

Conclusions:

• Both local and global harmonic contexts significantly impact the processing of musical events.
• Local contextual effects in music perception manifest earlier than global contextual effects.
• The observed N5 interaction suggests that music syntactic integration occurs sequentially, with local integration preceding global integration.