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Related Experiment Video

Updated: Nov 8, 2025

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

Different computations underlie overt presaccadic and covert spatial attention.

Hsin-Hung Li^1,2, Jasmine Pan³, Marisa Carrasco^3,4

¹Department of Psychology, New York University, New York, NY, USA. hsin.hung.li@nyu.edu.

Nature Human Behaviour

|April 20, 2021

Summary

This summary is machine-generated.

Presaccadic attention enhances visual responses before eye movements by altering response gain, unlike covert attention mechanisms. This study reveals distinct computational processes for overt and covert attention.

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Related Experiment Videos

Last Updated: Nov 8, 2025

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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:

Cognitive Neuroscience
Visual Perception
Computational Neuroscience

Background:

Perception and action are closely linked, with visual responses enhanced before saccades (eye movements) due to presaccadic attention.
Presaccadic attention, a form of overt attention, is well-documented, but its computational basis is unclear.
Covert attention, without eye movements, is explained by normalization models, unlike overt attention.

Purpose of the Study:

To investigate the computational mechanisms underlying presaccadic attention.
To compare the computational processes of overt presaccadic attention with those of covert spatial attention.
To determine how presaccadic attention modulates visual performance.

Main Methods:

Conducted a series of psychophysical experiments to measure visual performance.
Analyzed changes in visual responses in relation to saccade onset and attention field size.
Compared empirical results with predictions from a normalization model of attention.

Main Results:

Presaccadic attention modulates visual performance exclusively through response gain changes.
Response gain changes were observed even with increased attention field size, contradicting normalization model predictions.
Empirical findings indicate that overt presaccadic and covert spatial attention utilize different computational strategies.

Conclusions:

The computational process of presaccadic attention involves response gain modulation.
Normalization models do not fully explain the effects of presaccadic attention, particularly concerning attention field size.
Overt and covert attention employ distinct computational mechanisms for perceptual modulation.