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Related Experiment Video

Updated: Dec 31, 2025

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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Unraveling the Relation between EEG Correlates of Attentional Orienting and Sound Localization Performance: A

Laura-Isabelle Klatt1, Daniel Schneider1, Anna-Lena Schubert2

  • 1Leibniz Research Centre for Working Environment and Human Factors.

Journal of Cognitive Neuroscience
|January 15, 2020
PubMed
Summary

Neurophysiological signals like anterior contralateral N2 subcomponent (N2ac) amplitudes aid auditory localization accuracy and information processing speed. Posterior alpha lateralization did not correlate with performance in younger or older adults.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Auditory Perception

Background:

  • Understanding neurophysiological signals' contribution to behavior is crucial.
  • Spatial attention correlates in electroencephalogram (EEG) are well-established.
  • Auditory spatial attention mechanisms, especially in older adults, require further investigation.

Purpose of the Study:

  • To investigate the contribution of EEG correlates of spatial attention to auditory sound localization performance.
  • To determine if posterior alpha lateralization and anterior contralateral N2 subcomponent (N2ac) amplitudes predict behavioral and diffusion model parameters.
  • To explore age-related differences in the brain-behavior relationship for sound localization.

Main Methods:

  • Utilized a diffusion model framework to analyze sound localization performance.
  • Recorded EEG data from younger and older participants during a free-field sound localization task.
  • Employed regression analyses to link EEG signals (N2ac, alpha lateralization) with behavioral (accuracy, RT) and diffusion model parameters (drift rate, boundary separation, non-decision time).

Main Results:

  • Anterior contralateral N2 subcomponent (N2ac) amplitudes significantly predicted increased drift rate and accuracy.
  • Posterior alpha lateralization did not show a significant relationship with behavioral or diffusion model parameters.
  • These findings were consistent across both younger and older adult groups.

Conclusions:

  • Enhanced N2ac amplitudes reflect more efficient attentional filtering, leading to faster information uptake and better sound localization accuracy.
  • Poststimulus alpha lateralization does not appear to be a reliable correlate of performance in this auditory task, unlike prestimulus alpha power.
  • The study underscores the importance of differentiating anticipatory versus poststimulus alpha power modulations in attention research.