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Related Experiment Video

Updated: Jun 17, 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

Objects with reduced visibility still contribute to size averaging.

H Choo¹, S L Franconeri

¹Department of Psychology, Northwestern University, 2029 Sheridan Rd., Evanston, IL 60208, USA. h-choo@northwestern.edu

Attention, Perception & Psychophysics

|January 5, 2010

Summary

This summary is machine-generated.

Early visual processing, even with impaired visibility, contributes to judging average object size. This suggests size-averaging relies on initial object representations, not just later, fully processed ones.

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Area of Science:

Cognitive Psychology
Visual Perception
Neuroscience

Background:

Humans accurately estimate the average size of object collections.
The visual system's processing stages for size-averaging remain unclear.

Purpose of the Study:

To determine if size-averaging uses early or late visual object representations.
To investigate the role of object substitution masking (OSM) in size-averaging.

Main Methods:

Participants judged average circle size with and without object substitution masking (OSM).
Mask duration varied to manipulate visual processing stages (early vs. late).
Influence of masked vs. visible circles on averaging was analyzed.

Main Results:

Average size estimation was affected by both visible and OSM-impaired circles.
No correlation was found between masked circle influence and OSM susceptibility.
Early visual representations contribute to size-averaging despite reduced visibility.

Conclusions:

Size-averaging utilizes relatively early visual object representations.
Reduced visibility does not preclude contribution to size-averaging.
Object substitution masking (OSM) provides insights into visual processing stages.