Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Stimulus manipulations that reduce the square-wave illusion

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Spatial Vision
For more content, see Multisensory Research and Seeing and Perceiving.

When observers view a triangle-wave luminance profile, they often report a square-wave illusion with a depth component. Alternate bars appear to be in different depth planes and the surface appears corrugated; illuminated from either the right or the left. These perspectives alternate with continuous viewing. One explanation for this illusion stems from a local energy model of feature detection proposed by Morrone and Burr (Proc. Roy. Soc. Lond. B235, 221-245, 1988). This model assumes two phase-sensitive mechanisms that process lines and edges in the visual image. It is suggested that the square-wave illusion derives from rivalry between these two mechanisms. In Experiment 1, the aim was to determine whether phase alternation of the triangle wave would lead to differences in the duration and number of perceptual reversals of the illusion. The results indicate a decline in illusion duration and frequency of reversal rate with increased alternation rate. With the addition of some assumptions about the temporal resolution of the line and edge detectors, the results support the proposed explanation. In Experiment 2, the effects of high spatial-frequency contrast increments and decrements were explored. Increments did not lead to significant increases in the duration of the square-wave illusion or reversal rate, but decrements resulted in a substantial reduction in the illusion duration and reversal rate. The results indicate that manipulations which alter the phase relationships of the triangle wave decrease the illusion, but manipulations which maintain them do not.

Affiliations: 1: Department of Psychology, University of New Orleans, Lakefront, New Orleans, LA 70148, USA


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Spatial Vision — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation