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Related Experiment Video

Updated: Sep 27, 2025

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

Published on: January 23, 2017

Spectral Distribution Dynamics across Different Attentional Priority States.

Mattia Pietrelli¹, Jason Samaha², Bradley R Postle^3,4

¹Department of Psychiatry, University of Wisconsin-Madison, Madison, Wisconsin 53719.

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

|April 7, 2022

Summary

Anticipatory spatial attention may not inhibit unattended locations. Instead, selection of one location might return others to baseline, with a tonic physiological adjustment influencing attended and unattended sites.

Keywords:

LASSO aperiodic component irrelevant location multivariate analysis spatial attention α oscillation

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Published on: March 18, 2019

Area of Science:

Neuroscience
Cognitive Psychology
Human Behavior

Background:

Anticipatory covert spatial attention enhances visual task performance.
Alpha (α) band power in electroencephalography (EEG) changes with attended and unattended locations.
The increase in α power at unattended locations is debated: active inhibition versus a consequence of selection elsewhere.

Purpose of the Study:

To differentiate between active inhibition and secondary consequence theories of α band dynamics in spatial attention.
To investigate the role of α band oscillations and aperiodic EEG components during covert spatial attention.

Main Methods:

A Posner-style visual cueing task with blocked location statuses (attended/unattended/irrelevant).
Participants judged target orientation at one of four possible locations.
EEG data analyzed for narrowband α, periodic α, and aperiodic 1/f slope.

Main Results:

No difference in α signal time course between unattended and irrelevant locations.
This finding supports the secondary-consequence interpretation of α band dynamics.
A shallower 1/f slope at attended and unattended locations suggests a tonic physiological state adjustment.

Conclusions:

The increase in α power at unattended locations may not reflect active inhibition.
Attention might work by returning unattended locations to a baseline physiological state.
Aperiodic EEG components indicate tonic physiological adjustments related to spatial selection.