| 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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| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
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| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
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etd.pdf |
1.57 Mb |
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