An Evaluation of Input Controls for In-Car Interactions
summary
Real-world on-road comparison of a touchscreen, a physical USB dial and a pressure-based surface (Surface Pro 2 inside a 3D-printed case) evaluates pressure-based input, a dial and direct touch with and without vibrotactile feedback. Twenty-six drivers perform list-selection tasks; accuracy stays >94% across methods. Direct touch is fastest; pressure-based is almost four times slower and produces the most glances toward the screen (but shorter glance durations). Pressure sensors use 3 Newtons to move / 2 Newtons to select and added vibration reduces visual attention.
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