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

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Published on: January 23, 2017

Effects of feature-based attention on numerosity perception.

Xin Yan¹, Baoyi Zhu², Ce Mo¹

¹Sun-Yat-Sen University, China.

|March 19, 2025

Summary

This summary is machine-generated.

The human sense of number is influenced by selective attention. Feature-based attention modulates numerosity perception through a unique mechanism, impacting visual search and adaptation.

Keywords:

adaptation feature-based attention numerosity perception visual search

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Last Updated: May 21, 2025

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Published on: January 23, 2017

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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

Background:

The human ability to perceive numerosity (sense of number) is rapid and visually driven.
The influence of selective attention on numerosity perception remains largely unexplored.
Understanding this relationship is key to understanding visual attention mechanisms.

Purpose of the Study:

To investigate how feature-based attention affects the perception of numerosity.
To determine if numerosity acts as a unique feature for attentional selection.
To elucidate the mechanisms by which attention modulates numerosity processing.

Main Methods:

Utilized visual search paradigm to assess attention capture by numerosity outliers.
Employed numerosity adaptation paradigm to measure the impact of attended numerosity.
Compared adaptation aftereffects when attended numerosity matched or differed from the adaptor.

Main Results:

Visual search for numerosity-defined targets exhibited a "semiparallel" pattern, indicating time-consuming attention capture.
Reduced adaptation aftereffects were observed when attended numerosity matched the adaptor.
Feature-based attention was found to weaken the perceptual representation of numerosity.

Conclusions:

Numerosity functions as a distinct unit for nonspatial feature-based attention.
Attention modulates numerosity perception through a mechanism unique from other visual features.
This research provides novel insights into the interaction between attention and number sense.