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Attentional Limitations and the Visual Pathways

Maeda, Satomi
http://rave.ohiolink.edu/etdc/view?acc_num=wright1244773263

Abstract Details

2009, Doctor of Philosophy (PhD), Wright State University, Human Factors and Industrial/Organizational Psychology PhD.
The present study tested the hypothesis that three visual pathways (i.e. parvocellular, magnocellular, and koniocellular pathways) may influence the degree of dual-task interference using dual-task methodology. The magnocellular pathway consists of feature-coding mechanisms that are sensitive to transients and motion, and is thought to process information about the locations and movements of objects. The parvocellular pathway consists of feature-coding mechanisms that are sensitive to red-green and brightness information, while the koniocellular pathway consists of feature-coding mechanisms that are sensitive to blue-yellow chromatic information. Both the parvocellular and the koniocellular pathway are thought to process information useful for identifying objects. The hypothesis predicted that engaging in two search tasks that were mediated by feature-coding mechanisms in two different pathways would result in less dual-task interference in performance than two tasks that were mediated by feature-coding mechanisms in the same pathway. Magnocellular stimuli were defined by brief luminance transients and motion, and parvocellular and koniocellular stimuli were defined by color. The most interference was observed for task pairs that were different in nature and mediated in one pathway. Two tasks mediated by the two different pathways resulted in a small interference, while two identical task pairs mediated by one pathway resulted in no dual-task interference. No significant negative contingency was observed in any task pair. Dual-task interference consistent with a sampling model (e.g. Bonnel et al., 1992) and an independence model (e.g. Morrone et al., 2002 and 2004) were observed. No task pairs produced dual-task interference consistent with the prediction of a switching model (e.g. Duncan, 1996).
Allen Nagy, PhD (Committee Chair)
Scott Watamaniuk, PhD (Committee Member)
Pamela Tsang, PhD (Committee Member)
Michael Hennessy, PhD (Committee Member)
105 p.
Psychology
visual attention; visual pathways; visual search; divided attention; dual-task

Recommended Citations

Citations

  • Maeda, S. (2009). Attentional Limitations and the Visual Pathways [Doctoral dissertation, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1244773263

    APA Style (7th edition)

  • Maeda, Satomi. Attentional Limitations and the Visual Pathways. 2009. Wright State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1244773263.

    MLA Style (8th edition)

  • Maeda, Satomi. "Attentional Limitations and the Visual Pathways." Doctoral dissertation, Wright State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1244773263

    Chicago Manual of Style (17th edition)

wright1244773263
632
© 2009, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.