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Related Experiment Video

Updated: May 11, 2026

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Eye Tracking During Visually Situated Language Comprehension: Flexibility and Limitations in Uncovering Visual Context Effects

Published on: November 30, 2018

Spatial structure of contextual modulation.

I Mareschal¹, C W G Clifford

¹School of Psychology & Australian Centre of Excellence in Vision Science, The University of Sydney, Sydney, New South Wales, Australia. imareschal@gmail.com

Journal of Vision

|May 7, 2013

Summary

This summary is machine-generated.

Human visual perception of orientation and motion is influenced by surrounding stimuli, with interactions varying between individuals. These contextual effects extend beyond collinearity, revealing complex modulations in visual processing.

Keywords:

contextual effects reverse correlation visual illusions

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Area of Science:

Visual neuroscience
Perception psychology
Computational vision

Background:

Contextual effects are common in vision, enabling localized detectors to perceive global stimulus properties.
Existing evidence suggests collinearity (spatial alignment of target and surround) maximizes neural interactions.

Purpose of the Study:

To investigate which spatial positions influence human perception by using a novel stimulus.
To determine the extent and nature of spatial areas contributing to contextual effects in vision.

Main Methods:

Development of a novel stimulus to probe all surrounding areas of a visual detector simultaneously.
Assessment of human observers' perception of orientation and motion under novel stimulus conditions.

Main Results:

The spatial areas contributing most to contextual effects are not limited to specific locations.
Significant interobserver variability exists in the weighting of detector interactions.
This variability is largely independent of collinear structure.

Conclusions:

Human visual perception relies on contextual effects extending beyond collinearity.
Interactions between visual detectors show significant, largely structure-independent, individual differences.
Novel stimuli reveal complex modulations of visual performance not predictable by conventional methods.