Skip to Main Content
Frequently Asked Questions
Submit an ETD
Global Search Box
Need Help?
Keyword Search
Participating Institutions
Advanced Search
School Logo
Files
File List
miami1061319633.pdf (242.16 KB)
ETD Abstract Container
Abstract Header
CONTEXTUAL EFFECTS ON FINE ORIENTATION DISCRIMINATION TASKS
Author Info
Saylor, Stephanie A.
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=miami1061319633
Abstract Details
Year and Degree
2003, Master of Arts, Miami University, Psychology.
Abstract
Two experiments were designed to examine the influence of context on fine orientation discrimination performance. In Experiment 1, judgments about a center grating were impaired in the presence of vertical sinusoidally-modulated surrounds containing the same spatial frequency (SF) and contrast as the center. When center and surround were out-of-phase, separated by a gap of mean luminance, or unmatched in SF, performance remained at control levels. In Experiment 2, center and surround were abutting and contained the same SF, but differed in mean luminance in an effort to create the perception of two objects. When center and surround were mismatched in luminance (i.e. mean luminance was high in the center and low in the surround, or vise versa) suppression was reduced or eliminated and performance was equivalent to luminance mismatched control conditions. We speculate that lateral interactions in fine orientation discrimination tasks do not occur between objects that are perceptually distinct.
Committee
Lynn Olzak (Advisor)
Pages
32 p.
Keywords
Visual Psychophysics
;
Orientation Discrimination
;
Contextual Effects in Visual Processing
;
Lateral Masking in Visual Processing
;
Hyperacuity Tasks
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Saylor, S. A. (2003).
CONTEXTUAL EFFECTS ON FINE ORIENTATION DISCRIMINATION TASKS
[Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1061319633
APA Style (7th edition)
Saylor, Stephanie.
CONTEXTUAL EFFECTS ON FINE ORIENTATION DISCRIMINATION TASKS.
2003. Miami University, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=miami1061319633.
MLA Style (8th edition)
Saylor, Stephanie. "CONTEXTUAL EFFECTS ON FINE ORIENTATION DISCRIMINATION TASKS." Master's thesis, Miami University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1061319633
Chicago Manual of Style (17th edition)
Abstract Footer
Document number:
miami1061319633
Download Count:
654
Copyright Info
© 2003, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.