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PSYCHOPHYSIOLOGICAL ASSESSMENT OF COGNITIVE AND AFFECTIVE RESPONSES FOR PREDICTION OF PERFORMANCE IN AROUSAL INDUCING VIRTUAL ENVIRONMENTS by Christopher Gaelan Courtney A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PSYCHOLOGY) December 2012 Copyright 2012 Christopher Gaelan Courtney
|Title||Psychophysiological assessment of cognitive and affective responses for prediction of performance in arousal inducing virtual environments|
|Author||Courtney, Christopher Gaelan|
|Degree||Doctor of Philosophy|
|School||College of Letters, Arts And Sciences|
|Advisor (committee chair)||Dawson, Michael E.|
|Advisor (committee member)||
Parsons, Thomas D.
Schell, Anne M.
Tjan, Bosco S.
Huey, Stanley J., Jr.
Brekke, John S.
|Abstract||The current study sought to examine the psychophysiological response patterns associated with varying levels of threat and cognitive workload in a highly immersive virtual environment (VE) containing a route-learning and navigation task scenario. Participants were led down a specific path through a virtual city by a group of virtual guides. Upon reaching the goal of this initial tour through the city, participants were instructed to navigate back to the starting point of the tour following the same path taken to reach the goal. Two separate experiments were conducted to examine the effects of threat and cognitive workload variations in the environment separately. Psychophysiological responses to threat in Experiment 1 and varying levels of cognitive workload in Experiment 2 were then utilized to develop multiple linear regression (MLR) and artificial neural network (ANN) models for prediction of performance on the navigation task. Comparisons of predictive abilities between the developed models were performed to determine optimal model parameters. Awareness of the navigation task was manipulated such that half of the participants in each experiment were made aware of the navigation task prior to the initial tour to allow for route-learning assessment, while the other half were told only after tour completion to assess response patterns associated with threat and cognitive workload in the absence of the added task of committing the route to memory. Participants made aware of the navigation task evidenced increased efficiency on the return trip through the city. Additionally, the threat level and cognitive workload manipulations were successful in eliciting varying response patterns during areas of high and low intensity stimulus presentations. Finally, ANN models were determined to better predict navigation performance based on psychophysiological responses gleaned during the initial tour through the city. The selected models were able to predict navigation performance with better than 80% accuracy in both Experiments 1 and 2. Applications of the models toward improved human-computer interaction and psychophysiologically-based adaptive systems are discussed.|
|Keyword||psychophysiology; virtual reality; navigation; threat; cognitive workload|
|Part of collection||University of Southern California dissertations and theses|
|Publisher (of the original version)||University of Southern California|
|Place of publication (of the original version)||Los Angeles, California|
|Publisher (of the digital version)||University of Southern California. Libraries|
|Provenance||Electronically uploaded by the author|
|Legacy record ID||usctheses-m|
|Rights||Courtney, Christopher Gaelan|
|Access conditions||The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given.|
|Repository name||University of Southern California Digital Library|
|Repository address||USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA|
|Full text||PSYCHOPHYSIOLOGICAL ASSESSMENT OF COGNITIVE AND AFFECTIVE RESPONSES FOR PREDICTION OF PERFORMANCE IN AROUSAL INDUCING VIRTUAL ENVIRONMENTS by Christopher Gaelan Courtney A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PSYCHOLOGY) December 2012 Copyright 2012 Christopher Gaelan Courtney|