Stereomotion speed perception is contrast dependent

Kevin Brooks*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


The effect of contrast on the perception of stimulus speed for stereomotion and monocular lateral motion was investigated for successive matches in random-dot stimuli. The familiar 'Thompson effect' - that a reduction in contrast leads to a reduction in perceived speed - was found in similar proportions for both binocular images moving in depth, and for monocular images translating laterally. This result is consistent with the idea that the monocular motion system has a significant input to the stereomotion system, and dominates the speed percept for approaching motion.

Original languageEnglish
Pages (from-to)725-731
Number of pages7
Issue number6
Publication statusPublished - 2001
Externally publishedYes


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