Independence of Foveal Retinal Locus and Visual Detection Paradigm.
Abstract
The effect of horizontal retinal locus at -3, -2, -1, -.5, 0, .5, 1, 2, 3 degrees visual angle was examined in a variety of reaction time and detection paradigms. Seven subjects participated in a two alternative 2:1 choice reaction time task, Posner match task, and a scanning memory set size 1 and 3 task. In a second experiment subjects participated in a consistent or varied mapping memory set size 2, display size 2 reaction time task. Also, a multiple frame detection paradigm task measured detection probability with memory set size 2, number of display channels 2, memory set either consistently or variably mapped, and frame time of 100 or 200 msec for the consistent or variably mapped conditions, respectively. The main effects of experimental paradigm and retinal locus were significant, but the interactions were not. The results are discussed in terms of an automatic letter encoding stage which could take the form of a discrete stage or a continuous output which cascades into the next stage for search and detection. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 09, 1980
- Accession Number
- ADA084147
Entities
People
- Arthur D. Fisk
- Walter Schneider
Organizations
- University of Illinois Urbana–Champaign