Skip to content

Visual reaction time and size constancy

by Irene Sperandio, Silvia Savazzi, Richard L. Gregory, Carlo A. Marzi
Perception ()
Get full text at journal


We carried out six experiments to find out whether simple manual reaction time (RT) to flux-equated visual stimuli of different size is modulated by size constancy or by the retinal angle subtended by the stimuli. We found that RT decreased with the increase in perceived stimulus size rather than retinal angle and that this relationship depended on the use of familiar 3-D-like stimuli and on the availability of other size-constancy cues. Thus, a stereotyped speeded motor response, such as that employed in a simple RT paradigm, is modulated by size constancy, as is the case with perceptual judgments. The present results provide original evidence on the relationship between simple RT and perception.

Cite this document (BETA)

Authors on Mendeley

Readership Statistics

30 Readers on Mendeley
by Discipline
63% Psychology
10% Agricultural and Biological Sciences
7% Medicine and Dentistry
by Academic Status
33% Student > Ph. D. Student
13% Professor > Associate Professor
13% Student > Postgraduate
by Country
7% Germany
7% Brazil
3% Netherlands

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in