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Configural Displays: The Effects Of Salience On Multi-Level Data Extraction, Audrey Fok
Configural Displays: The Effects Of Salience On Multi-Level Data Extraction, Audrey Fok
Electronic Theses and Dissertations
Displays are a useful tool for users and operators to understand information quickly. Configural displays are effective in supporting focus and divided attention tasks through the use of emergent features. Emergent features are highly salient and are generally used to support divided attention task However, due to the salience of emergent features, a potential performance costs to focused attention tasks arises with configural displays. To address this cost, semantic mapping has been used to map salience techniques to information needed by focus attention tasks to increase their saliency (Bennett & Walters, 2001; Bennett et al., 2000). Semantic mapping is the …
Impacts Of Complexity And Timing Of Communication Interruptions On Visual Detection Tasks, Sally Stader
Impacts Of Complexity And Timing Of Communication Interruptions On Visual Detection Tasks, Sally Stader
Electronic Theses and Dissertations
Auditory preemption theory suggests two competing assumptions for the attention-capturing and performance-altering properties of auditory tasks. In onset preemption, attention is immediately diverted to the auditory channel. Strategic preemption involves a decision process in which the operator maintains focus on more complex auditory messages. The limitation in this process is that the human auditory, or echoic, memory store has a limit of 2 to 5 seconds, after which the message must be processed or it decays. In contrast, multiple resource theory suggests that visual and auditory tasks may be efficiently time-shared because two different pools of cognitive resources are used. …
Comparing Types Of Adaptive Automation Within A Multi-Tasking Environment, Grant S. Taylor
Comparing Types Of Adaptive Automation Within A Multi-Tasking Environment, Grant S. Taylor
Electronic Theses and Dissertations
Throughout the many years of research examining the various effects of automation on operator performance, stress, workload, etc., the focus has traditionally been on the level of automation, and the invocation methods used to alter it. The goal of the current study is to instead examine the utilization of various types of automation with the goal of better meeting the operator’s cognitive needs, thus improving their performance, workload, and stress. The task, control of a simulated unmanned robotic system, is designed to specifically stress the operator’s visual perception capabilities to a greater degree. Two types of automation are implemented to …
A Comparison Of Attentional Reserve Capacity Across Three Sensory Modalities, John Brill
A Comparison Of Attentional Reserve Capacity Across Three Sensory Modalities, John Brill
Electronic Theses and Dissertations
There are two theoretical approaches to the nature of attentional resources. One proposes a single, flexible pool of cognitive resources; the other poses there are multiple resources. This study was designed to systematically examine whether there is evidence for multiple resource theory using a counting task consisting of visual, auditory, and tactile signals using two experiments. The goal of the first experiment was the validation of a multi-modal secondary loading task. Thirty-two participants performed nine variations of a multi-modal counting task incorporating three modalities and three demand levels. Performance and subjective ratings of workload were measured for each of the …
Effect Of Repeated Function Allocation And Reliability On Automation Induced Monitoring Inefficiency, Lauriann Maria Jones
Effect Of Repeated Function Allocation And Reliability On Automation Induced Monitoring Inefficiency, Lauriann Maria Jones
Electronic Theses and Dissertations
The purpose of this study is to extend previous findings of Mouloua, Parasuraman, and Molloy (1993), Parasuraman, Mouloua, and Molloy (1996), Hilburn, Parasuraman, and Mouloua (1996), and Oakley, Mouloua, and Hancock (2003) by: 1) examining the effect of repeated adaptive function allocation to manual control of minimal length (5 minutes) to reduce of human error and minimize workload; 2) explore the placement or timing of adaptive function allocation intervals (approximately 20 minutes of automation control to reduce the human operators' monitoring decrement between intervals, maintain adaptive recovery performance levels, and improve response times); 3) examine different levels of automation reliability …
The Effects Of Secondary Task Demandon The Assessment Of Threat, Harriss Ganey
The Effects Of Secondary Task Demandon The Assessment Of Threat, Harriss Ganey
Electronic Theses and Dissertations
Threat perception is an important issue in today's world. As the line between hostile and non-hostile entities is blurred, it becomes more important for individuals to clearly distinguish between those who would present danger and those who would not. This series of experiments tested whether observers engaged in a dual-task paradigm perceived a greater amount of threat from target stimuli than they did when they were engaged in the threat task alone. The first experiment revealed that observers rated targets as more threatening when they were engaged in the additional task than when they only rated the targets themselves. Response …