Integrating Imperfect Automated Aids Into a Multi -Task Situations
Colcombe, Angela Marie
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Permalink
https://hdl.handle.net/2142/82107
Description
Title
Integrating Imperfect Automated Aids Into a Multi -Task Situations
Author(s)
Colcombe, Angela Marie
Issue Date
2006
Doctoral Committee Chair(s)
Christopher Wickens
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Psychology, Cognitive
Language
eng
Abstract
Automated aids are typically designed to help people monitor for particular events or situations during complex tasks. Automated aids can be useful by taking over a function once performed by the human thereby freeing up the person to do other tasks. However, automated aids may also introduce costs to task performance that are not readily apparent. In four experiments, we examined the impact of interruptions by an alarm embedded within a Cockpit Display of Traffic Information (CDTI) on two types of concurrent tasks; a compensatory tracking task and a working memory task. In addition, we examined how three important alarm characteristics; the informativeness (three vs. two stage alerts), the modality, and the threshold of the alert, affected both conflict detection and concurrent task performance. Automated aids with higher false alarm rates resulted in poorer concurrent task performance, as evidenced by higher tracking error and reduced working memory accuracy. Likelihood alerts did not mitigate costs associated with performance decrements due to the reduced alert threshold. Finally, auditory alerts tended to produce an auditory preemption effect, driving attention quickly to the alerted domain at the expense of concurrent task performance.
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