Selective and divided attention modulates auditory-vocal integration in the processing of pitch feedback errors

Area of Science:

• Neuroscience
• Speech Production
• Auditory Perception

Background:

• Vocal productions are rapidly adjusted to correct perceived auditory feedback errors.
• The specific role of attention in these vocal compensation mechanisms remains unclear.

Purpose of the Study:

• To investigate how selective and divided attention influence vocal and neural responses to pitch errors in auditory feedback.
• To understand the interplay between attention and auditory-vocal integration during pitch error processing.

Main Methods:

• Event-related potential (ERP) study design.
• Participants produced sustained vowels with pitch errors introduced in auditory feedback.
• Attentional conditions included selective auditory, selective visual, divided auditory-visual, and control.

Main Results:

• Larger vocal compensations were observed when attending to auditory pitch perturbations versus visual stimuli.
• P2 event-related potential (ERP) responses to pitch errors were larger with auditory attention compared to visual or control conditions.
• Divided attention suppressed P2 responses and enhanced N1 responses relative to the control condition.

Conclusions:

• Attention significantly modulates auditory-vocal integration for processing pitch feedback errors.
• Selective and divided attention differentially affect the neurobehavioral processing of vocal pitch errors.