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Related Experiment Video

Updated: Jun 25, 2025

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

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Published on: October 24, 2012

Transient Attention Gates Access Consciousness: Coupling N2pc and P3 Latencies Using Dynamic Time Warping.

Mahan Hosseini^1,2, Alon Zivony³, Martin Eimer⁴

¹The School of Computing, University of Kent, Canterbury CT2 7NZ, United Kingdom.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|May 24, 2024

Summary

Researchers found a temporal link between the N2pc (selective attention) and P3 (working memory) event-related potentials (ERPs). This connection, measured using dynamic time warping, was weaker when distractors interfered with attention.

Keywords:

N2pc P3 consciousness electroencephalography selective attention working memory

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Published on: September 3, 2021

Area of Science:

Cognitive Neuroscience
Psychophysiology
Computational Neuroscience

Background:

Event-related potentials (ERPs), specifically the N2pc and P3 components, are crucial for understanding selective attention and working memory access, respectively.
While temporal and functional links between these ERPs are hypothesized, empirical evidence remains limited.
Investigating the relationship between attention and conscious awareness is a key area in cognitive science.

Purpose of the Study:

To demonstrate a convincing temporal link between the N2pc and P3 ERP components.
To explore the relationship between attention and access consciousness.
To introduce and validate a novel methodological approach for analyzing temporal associations between cognitive processes.

Main Methods:

Utilized dynamic time warping (DTW), a novel methodology, to analyze ERP data.
Collected data from 23 participants performing a rapid serial visual presentation task with distractor trials.
Analyzed ERP latencies for correct responses versus distractor intrusion trials.

Main Results:

DTW analysis revealed a significant temporal correlation between N2pc and P3 latencies across trial types.
The N2pc-P3 temporal link was found to be weaker during distractor intrusion trials.
The findings suggest a modulation of the attention-ERP association by cognitive interference.

Conclusions:

The study provides strong evidence for a temporal linkage between the N2pc and P3 ERPs.
The novel DTW method is effective for assessing temporal relationships between cognitive processes and their modulators.
The findings contribute to understanding the interplay between selective attention and conscious awareness.