Related Experiment Video
Updated: Aug 23, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
Published on: April 16, 2014
Perception-action and the Müller-Lyer illusion: amplitude or endpoint bias?
Cheryl M Glazebrook1, Victoria P Dhillon, Katherine M Keetch
1Department of Kinesiology, McMaster University, Hamilton, ON, L8S 4K1, Canada.
Abstract:
Over the past decade there has been a great deal of controversy regarding the relative impact of visual illusions on cognitive judgments and the control of goal-directed action. We report the results of two experiments indicating that perceptual biases associated with the Müller-Lyer illusion involve a misjudgment of amplitude/extent while aiming biases involve error in the specification of a movement endpoint. This dissociation of perception and action is consistent with some aspects of Milner and Goodale's two visual system model, but not others.
Related Concept Videos
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
First Impression
Depth Perception and Spatial Vision
Subliminal Perception
Perception
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Gestalt Principles of Perception

