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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Published on: April 21, 2023

Humans can efficiently look for but not select multiple visual objects.

Eduard Ort^1,2, Johannes Jacobus Fahrenfort^1,2,3, Tuomas Ten Cate⁴

¹Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.

|August 28, 2019

Summary

This summary is machine-generated.

The brain can prepare to select two visual objects with minimal cost, but actively selecting them incurs significant neural and behavioral expenses due to competition, not a serial bottleneck.

Keywords:

EEG MVPA attentional template feature-based attention human multiple targets neuroscience visual search

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Area of Science:

Cognitive Neuroscience
Visual Attention Research

Background:

The human brain prioritizes task-relevant visual information.
A key question is whether the brain can simultaneously prioritize multiple objects.

Purpose of the Study:

To investigate the neural and behavioral costs of preparing for and engaging in the selection of multiple visual objects.
To differentiate between preparation and engagement costs in visual selection.

Main Methods:

Observers searched for two colored targets among distractors.
The number of anticipated target colors and actual target colors were independently varied.
Multivariate classification of electroencephalographic (EEG) activity tracked target selection over time.

Main Results:

Small neural and behavioral costs were observed when preparing to select two objects.
Substantial costs arose during the actual engagement of selection for multiple objects.
Analysis indicated neural competition limits parallel processing, rather than a serial bottleneck.

Conclusions:

Engaging in the selection of multiple objects incurs significant costs due to neural competition.
Findings suggest limited parallel processing capacity in feature-based attention.
The study reconciles differing theories on attentional capacity limitations.