| Summary: | 碩士 === 國立成功大學 === 工業與資訊管理學系 === 102 === In 2013, 51% of Taiwanese have smart phones. Increasing relying on smart phones and tablet PCs could bring a lot of negative effect, (i.e. Car accidents caused by using cell phone while driving, pedestrian fallings due to using smart phone.) Some studies have shown that the number of injuries caused by using cell phone while walking are increasing, but few studies focus on pedestrian’s reaction performance on road hazard detection. For this reason, this study aimed to investigate pedestrians’ situation awareness using in dual-task paradigm, along with reaction performance in visual detection modalities modified when pedestrians’ attention is distracted by cell phone tasks. There were three cell phone tasks and two traffic frequencies. Every twenty-two participants completed all the six tested 5-min scenarios, where participants’ eye movement data, cell phone tasks performance, reaction performance, situation awareness score and mental workload were recorded examined further.
The results showed that the reading task incurred the highest mental workload, and picture matching task is the lowest one. Moreover, conducting typing task on a smartphone tended to interfere with participants’ ability to detect road events particularly in high frequency situation. In term of the results from reaction performance, shorter detection time and better reaction error rate in doing picture matching task. In addition, examining eye movement data found pedestrians adopted different strategies to deal with two traffic frequencies by using more ambient vision to detect environmental events. Furthermore, participants used lesser ambient vision while conducting typing tasks and this lead to longer corrected reaction time/detection time, lesser situation awareness, and higher mental workload. Given the study results, it is recommend that pedestrians should be more cautious of reading or typing while walking
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