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AN INVESTIGATION OF THE RELATIONSHIPS BETWEEN MOTIVATION, WORKER ROLE CONFLICTS AND WORKER OUTCOMES
Title
AN INVESTIGATION OF THE RELATIONSHIPS BETWEEN MOTIVATION, WORKER ROLE CONFLICTS AND WORKER OUTCOMES.
Creator
Kennedy, Robert, Pritchard, Robert, University of Central Florida
Abstract / Description
This study investigated the relationships between several work motivational process variables and work-life-conflict (WLC) and how these variables contribute to job related outcomes such as work performance, job satisfaction and life satisfaction. This survey study identified several correlations which suggest that a more comprehensive model of motivation should include variables such as energy pool and direction toward organizational objectives. Results also suggest that WLC contributes to...
Show moreThis study investigated the relationships between several work motivational process variables and work-life-conflict (WLC) and how these variables contribute to job related outcomes such as work performance, job satisfaction and life satisfaction. This survey study identified several correlations which suggest that a more comprehensive model of motivation should include variables such as energy pool and direction toward organizational objectives. Results also suggest that WLC contributes to the amount of energy pool available to workers and the amount of motivation exhibited by workers. WLC also impacts important job and life attitudes directly and through the above mentioned motivation process variables. The basis for a comprehensive work motivation model will be posited and theoretical and practical implications will be discussed.
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Date Issued
2011
Identifier
CFE0003816, ucf:48728
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0003816
Detecting Threats from Constituent Parts: A Fuzzy Signal Detection Theory Analysis of Individual Differences
Title
Detecting Threats from Constituent Parts: A Fuzzy Signal Detection Theory Analysis of Individual Differences.
Creator
Van De Car, Ida, Szalma, James, Hancock, Peter, Mouloua, Mustapha, Kennedy, Robert, University of Central Florida
Abstract / Description
Signal detection theory (SDT) provides a theoretical framework for describing performance on decision making tasks, and fuzzy signal detection theory (FSDT) extends this description to include tasks in which there are levels of uncertainty regarding the categorization of stimulus events. Specifically, FSDT can be used to quantify the degree to which an event is 'signal-like', i.e., the degree to which a stimulus event can be characterized by both signal and non-signal properties. For instance...
Show moreSignal detection theory (SDT) provides a theoretical framework for describing performance on decision making tasks, and fuzzy signal detection theory (FSDT) extends this description to include tasks in which there are levels of uncertainty regarding the categorization of stimulus events. Specifically, FSDT can be used to quantify the degree to which an event is 'signal-like', i.e., the degree to which a stimulus event can be characterized by both signal and non-signal properties. For instance, an improvised explosive device (IED) poses little threat when missing key elements of its assembly (a stimulus of low, but not zero, signal strength) whereas the threat is greater when all elements necessary to ignite the device are present (a stimulus of high signal strength). This research develops a link between key individual cognitive (i.e., spatial orientation and visualization) and personality (i.e., extroversion, conscientiousness, and neuroticism) differences among observers to performance on a fuzzy signal detection task, in which the items to be detected (IEDs) are presented in various states of assembly. That is, this research relates individual difference measures to task performance, uses FSDT in target detection, and provides application of the theory to vigilance tasks. In two experiments, participants viewed pictures of IEDs, not all of which are assembled or include key components, and categorize them using a fuzzy rating scale (no threat, low threat potential, moderate threat potential, or definite threat). In both experiments, there were significant interactions between the stimulus threat level category and the variability of images within each category. The results of the first experiment indicated that spatial and mechanical ability were stronger predictors of performance when the signal was ambiguous than when individuals viewed stimuli in which the signal was fully absent or fully present (and, thus, less ambiguous). The second study showed that the length of time a stimulus is viewed is greatest when the signal strength is low and there is ambiguity regarding the threat level of the stimulus. In addition, response times were substantially longer in study 2 than in study 1, although patterns of performance accuracy, as measured by the sensitivity index d', were similar across the two experiments. Together, the experiments indicate that individuals take longer to evaluate a potential threat as less critical, than to identify either an absence of threat or a high degree of threat and that spatial and mechanical ability assist decision making when the threat level is unclear. These results can be used to increase the efficiency of employees working in threat-detection positions, such as luggage screeners, provides an exemplar of use of FSDT, and contributes to the understanding of human decision making.
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Date Issued
2015
Identifier
CFE0006016, ucf:51015
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0006016
Mitigation of Motion Sickness Symptoms in 360(&)deg; Indirect Vision Systems
Title
Mitigation of Motion Sickness Symptoms in 360(&)deg; Indirect Vision Systems.
Creator
Quinn, Stephanie, Rinalducci, Edward, Hancock, Peter, Mouloua, Mustapha, French, Jonathan, Chen, Jessie, Kennedy, Robert, University of Central Florida
Abstract / Description
The present research attempted to use display design as a means to mitigate the occurrence and severity of symptoms of motion sickness and increase performance due to reduced (")general effects(") in an uncoupled motion environment. Specifically, several visual display manipulations of a 360(&)deg; indirect vision system were implemented during a target detection task while participants were concurrently immersed in a motion simulator that mimicked off-road terrain which was completely...
Show moreThe present research attempted to use display design as a means to mitigate the occurrence and severity of symptoms of motion sickness and increase performance due to reduced (")general effects(") in an uncoupled motion environment. Specifically, several visual display manipulations of a 360(&)deg; indirect vision system were implemented during a target detection task while participants were concurrently immersed in a motion simulator that mimicked off-road terrain which was completely separate from the target detection route. Results of a multiple regression analysis determined that the Dual Banners display incorporating an artificial horizon (i.e., AH Dual Banners) and perceived attentional control significantly contributed to the outcome of total severity of motion sickness, as measured by the Simulator Sickness Questionnaire (SSQ). Altogether, 33.6% (adjusted) of the variability in Total Severity was predicted by the variables used in the model. Objective measures were assessed prior to, during and after uncoupled motion. These tests involved performance while immersed in the environment (i.e., target detection and situation awareness), as well as postural stability and cognitive and visual assessment tests (i.e., Grammatical Reasoning and Manikin) both before and after immersion. Response time to Grammatical Reasoning actually decreased after uncoupled motion. However, this was the only significant difference of all the performance measures. Assessment of subjective workload (as measured by NASA-TLX) determined that participants in Dual Banners display conditions had a significantly lower level of perceived physical demand than those with Completely Separated display designs. Further, perceived temporal demand was lower for participants exposed to conditions incorporating an artificial horizon. Subjective sickness (SSQ Total Severity, Nausea, Oculomotor and Disorientation) was evaluated using non-parametric tests and confirmed that the AH Dual Banners display had significantly lower Total Severity scores than the Completely Separated display with no artificial horizon (i.e., NoAH Completely Separated). Oculomotor scores were also significantly different for these two conditions, with lower scores associated with AH Dual Banners. The NoAH Completely Separated condition also had marginally higher oculomotor scores when compared to the Completely Separated display incorporating the artificial horizon (AH Completely Separated). There were no significant differences of sickness symptoms or severity (measured by self-assessment, postural stability, and cognitive and visual tests) between display designs 30- and 60-minutes post-exposure. Further, 30- and 60- minute post measures were not significantly different from baseline scores, suggesting that aftereffects were not present up to 60 minutes post-exposure. It was concluded that incorporating an artificial horizon onto the Dual Banners display will be beneficial in mitigating symptoms of motion sickness in manned ground vehicles using 360(&)deg; indirect vision systems. Screening for perceived attentional control will also be advantageous in situations where selection is possible. However, caution must be made in generalizing these results to missions under terrain or vehicle speed different than what is used for this study, as well as those that include a longer immersion time.
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Date Issued
2013
Identifier
CFE0005047, ucf:49972
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005047