Abstract
Objective: This study examined the angular effects of a button on the center fascia of vehicle in terms of push force and satisfaction score.BRBRBackground: The angle of buttons on the center fascia may influence usability and user experience. However, a comprehensive study to investigate the angular effects of a button has been lacking.BRBRMethod: This study measured push forces and satisfaction scores for six angles (0°, 10° 20°, 30°, 40°, and 50°) of a button for 25 male participants. Push forces applied on a button with the right index finger were recorded using a force sensitive resistor, which was placed on a button. Subjective satisfaction scores were observed using a 5-point scale (1 = very dissatisfied, 3 = neutral, 5 = very satisfied).BRBRResults: Mean push forces at button angles 0~30° (mean ± SE; 3.31±0.06N) were significantly higher than the other angles (3.10±0.05N). Similarly, peak push forces at button angles 0~20° (4.43±0.04N) were higher than the other angles (4.28±0.04N). Satisfaction scores at button angles 10~30° (3.86±0.18) were higher than the other angles (2.50±0.18). The debriefing on experiment results revealed that participants preferred button angles 10~30° since it improved button usability and visibility than the other angles.BRBRConclusion: The button angles 10~30° can help effective force transmission and improve subjective satisfaction.BRBRApplication: The angular effects of a button identified in this study can be applied in ergonomic design of buttons on the center fascia of vehicle.
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