Original scientific paper

Lightness of Munker-White illusion and Simultaneous-Contrast illusion: Establishing an ordinal lightness relation among minimum and split-frame presentations

Ang Li ; Faculty of Arts and Sciences, Harvard University
Michael-John Tavantzis ; Cognitive and Neural Systems Department, Boston University
Arash Yazdanbakhsh ; Cognitive and Neural Systems Department, Boston University

Abstract

The achromatic Munker-White illusion and the Simultaneous-Contrast illusion have been used extensively in vision studies to understand how the figural configuration of a stimulus can affect the perceived lightness of its components in human perception. Yet, previous modeling and psychophysics studies did not directly compare the illusions’ lightness with controlled parameters of minimum stripes and split-frame presentations, which are useful in testing model predictions and in correlating neural firings to final percept in electrophysiology. In our study, subjects performed lightness matching of the four minimum and split-frame presentations of the illusions. We found the lightness order from lightest to darkest to be statistically significant after normalization within each subject: SCB > MWW > SCW > MWB. This is to say that the lighter frame of Simultaneous Contrast (SCB) is lighter than the lighter frame of Munker-White (MWW), which is lighter than the darker frame of Simultaneous Contrast (SCW), which is still lighter than the darker frame of Munker-White (MWB).

Keywords

: Munker-White; Simultaneous-Contrast; lightness; illusion; psychophysics; spatial frequency; split-frame

Hrčak ID:

70629

URI

https://hrcak.srce.hr/70629

Publication date:

18.7.2009.

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