Effect of Automotive Switch Type and its Location on Usability and Eye Movements

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  • MURATA Atsuo
    Graduate School of Natural Science and Technology, Okayama University
  • WANG Shuguang
    Graduate School of Natural Science and Technology, Okayama University

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  • 自動車用スイッチのタイプと設置位置が操作性と視線の動きに及ぼす影響
  • ジドウシャヨウ スイッチ ノ タイプ ト セッチ イチ ガ ソウサセイ ト シセン ノ ウゴキ ニ オヨボス エイキョウ

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Abstract

In this study, the effects of switch type and its location on the in-car task performance, the eye movements and the subjective evaluation on usability and workload were explored. Twenty young adults participated in the experiment. Experiment factors were switch type (four levels : number selection-type and cursor control-type non-integrated switches, thumb-operated dial-type and traditional dial-type integrated switches) and switch locations (three levels : steering, upper left (front), and lower left (lateral)). It tended that steering installation for all switch types led to shorter task completion time and shorter visual time off road. When the number selection-type non-integrated switch was placed around the steering wheel, the task completion time and the visual time off road were the shortest. The cursor control-type non-integrated switch was less affected by installation locations. The non-integrated switches were, as a whole, superior to the integrated switches from the viewpoints of task completion time and visual time off road. The analysis of NASA-TLX (WWL score) and subjective evaluation on usability showed that all types of switch obtain lower workload score and higher usability score when placed around the steering wheel.

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