Title page for ETD etd-05112004-135730


Type of Document Master's Thesis
Author Persaud, Steven S.
Author's Email Address supersaud@lycos.com
URN etd-05112004-135730
Title Contrast Sensitivity to One- and Two-Dimensional Luminance Patterns
Degree Master of Science
Department Industrial and Systems Engineering
Advisory Committee
Advisor Name Title
Beaton, Robert J. Committee Chair
Kleiner, Brian M. Committee Member
Prestrude, Albert M. Committee Member
Keywords
  • spatial vision
  • Fourier analysis
  • luminance
  • contrast sensitivity
Date of Defense 2004-05-05
Availability unrestricted
Abstract
Contrast sensitivities to one- and two-dimensional luminance patterns were compared in a two-alternative forced choice (2AFC) experiment. Space-averaged luminance was also manipulated. Statistical analyses revealed a main effect of stimulus dimension (p < .05) and no effect of space-averaged luminance. The main effect of stimulus dimension was explained in terms of an on-center, off-center receptive field model combined with watershed spatial vision behavior at spatial frequencies below 1 cycle-per-degree (cpd). The non-significant result for space-averaged luminance was explained by the limited range of manipulation of the variable. Two-dimensional luminance patterns were suggested as ideal patterns for reconciling grating-based spatial vision research with spatial vision behavior in an ecological context. Future research directions are suggested.
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