In 2017, distracted driving was identified as the cause of over 3,000 traffic fatalities. Driving distractions can come from different sense modalities such as vision and audition, or may be due to cognitive processes. One method for measuring driving distractions is the detection response task (DRT) in which participants detect peripheral stimuli while driving. Past studies have shown that when driving with an increase in visual load, visual stimulus detection is affected by the eccentricity of the stimulus, but an increase in cognitive load does not result in this same eccentricity effect. However, past research that manipulated cognitive load in a DRT may have had two methodological limitations: the stimuli were located at a limited number of eccentricities and the stimuli were highly conspicuous. Thus, the present study investigated whether adding more DRT stimulus locations and reducing stimulus conspicuity would produce a change in a driver’s functional field of view and result in worse detection performance. This study also investigated whether visual and auditory stimuli will show similar eccentricity effects when increasing cognitive load. The results showed that when cognitive load was increased performance on the visual DRT did not depend on eccentricity, but performance on the auditory DRT was affected by eccentricity. Not only were the auditory stimuli detected less accurately at the -/ +5° Eccentricities, but the auditory stimuli were missed more often. Driving performance was also analyzed, and it was shown that driving performance was best when the input modalities or processing codes of the timeshared tasks were different, aligning with Wickens’ multiple resource theory. The limitations and possible future research regarding DRT while driving is further discussed.
|Advisor:||Strybel, Thomas Z|
|Commitee:||Vu, Kim-Phuong L, Miles, Jim|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 81/3(E), Masters Abstracts International|
|Keywords:||Auditory, Cognitive load, Detection response task, Driving distractions, Eccentricity, Field of view|
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