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Related Experiment Video

Updated: Feb 24, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Task dependence of early attention modulation: the plot thickens.

Simon P Kelly¹, Kieran S Mohr¹

¹a School of Electrical and Electronic Engineering , University College Dublin , Dublin , Ireland.

Cognitive Neuroscience

|August 29, 2017

Summary

This summary is machine-generated.

Spatial attention modulates early visual processing in human V1, as shown by C1 visual evoked potential (VEP) components. This study re-examines discrepant findings regarding attentional modulation in visual cortex.

Keywords:

Attention C1 component human VEP primary visual cortex

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Last Updated: Feb 24, 2026

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Published on: March 18, 2019

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Published on: January 23, 2017

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

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Published on: July 5, 2015

Area of Science:

Neuroscience
Cognitive Neuroscience
Visual Neuroscience

Background:

Previous research demonstrated spatial attentional modulation of early visual processing in human area V1.
A recent study reported conflicting results, finding no such modulation using a similar task and analysis.

Purpose of the Study:

To investigate the reasons for discrepant findings regarding spatial attentional modulation in human V1.
To compare task conditions between the original and new studies to explain differing results.

Main Methods:

Re-analysis of existing data and comparison of experimental task conditions.
Examination of visual evoked potential (VEP) components, specifically the C1 component.

Main Results:

Identified differences in task conditions that may explain the conflicting results.
The study highlights the importance of precise task parameters in observing attentional effects.

Conclusions:

Discrepant findings in attentional modulation of V1 activity may stem from subtle differences in experimental design.
Understanding these differences is crucial for refining theories of visual attention and processing.