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Collinearity and Surround Size Effects on Spatial Discrimination Tasks

Kramer, Michael L
http://rave.ohiolink.edu/etdc/view?acc_num=miami1154716341

Abstract Details

2006, Master of Arts, Miami University, Psychology.
The present study was performed to better understand the effects of spatial characteristics of surrounds on suprathreshold spatial discrimination tasks. The tasks used were hyperacuity orientation (centered around vertical) and spatial frequency (centered around 4 cpd) discriminations between 40-minarc, circular center patches of sinusoidal grating. Surrounds were vertical, sinusoidal grating rings at exactly 4 cpd, with a ring width of 20-minarc. Surround size and location was modulated using BOW-TIE style stimuli (Cannon & Fullenkamp, 1991) in order to specifically test how collinearity (or its lack) affects fine spatial discriminations. Discriminability was measured using d’ values (obtained from a 6 point response scale). Our results suggest that collinear surround locations have a stronger inhibitory effect on these discrimination tasks when compared to non-collinear side-flank surround locations of equal size. Increasing surround coverage area created a stronger inhibitory effect or caused no significant change depending on the location.
Lynn Olzak (Advisor)
27 p.
collinear; SURROUND; sweep angle; spatial frequency; DISCRIMINATION TASKS; Observers; DISCRIMINATION

Recommended Citations

Citations

  • Kramer, M. L. (2006). Collinearity and Surround Size Effects on Spatial Discrimination Tasks [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1154716341

    APA Style (7th edition)

  • Kramer, Michael. Collinearity and Surround Size Effects on Spatial Discrimination Tasks. 2006. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1154716341.

    MLA Style (8th edition)

  • Kramer, Michael. "Collinearity and Surround Size Effects on Spatial Discrimination Tasks." Master's thesis, Miami University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1154716341

    Chicago Manual of Style (17th edition)

miami1154716341
594
© 2006, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.