Related Experiment Video
Updated: Aug 1, 2026

A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
Dissociable factors affect speed perception and discrimination
C W Clifford1, D H Arnold, P Wenderoth
1Department of Psychology, Macquarie University, Sydney, New South Wales, Australia. colin@vision.psy.mq.edu.au
Abstract:
Factors affecting our judgement of the speed of visual motion were investigated. Two types of judgement were made: perceived speed relative to a standard comparison stimulus, and discrimination between the speeds of similar stimuli. The factors affect ng these two judgements were found to be doubly dissociable, suggesting that they may be constrained by processing at different levels of the visual hierarchy. The results are discussed in terms of the 3-D interpretation of visual image motion, and related to possible neural substrates.
Related Concept Videos
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
Causes of Similarity-Dissimilarity Effect

