categorical/verbal processes), or stage of processing, will interfere with each other more than two tasks that draw upon different resources 3, 4. Multiple resource theory suggests that two tasks that draw upon the same sensory modality, code (i.e., analogue/spatial vs. Driving makes intense demands on visual perception 2. Road traffic injuries are now the leading killer of people aged 5–29 years. The 2018 World Health Organization (WHO) global status report on road safety highlights that the number of annual road traffic deaths has reached 1.35 million 1. These results provide the first quantitative support for introducing digital haptics into vehicle and similar contexts. This was not due to a speed-accuracy trade-off there was no evidence for modulation of VST accuracy according to modality of the tablet task. Reaction times (RTs) on the visual search task were fastest when the tablet task was haptic-only. We reasoned that the primary task would be performed best when the secondary task was haptic-only. Sliders were presented visually, haptically, or visuo-haptically and were vertical, horizontal or circular. The primary task was a centrally-presented visual conjunction search task, and the secondary task entailed control of laterally-presented sliders on the tablet. Healthy human participants (N = 25) completed a divided-attention paradigm. Here, we provide a proof-of-concept for the effectiveness of digital haptic technologies (hereafter digital haptics), which use ultrasonic vibrations on a tablet screen to render haptic perceptions. Haptics may help maintain or even increase visual attention to the road, while still allowing for reliable dashboard control. Nevertheless, vision is subject to multisensory influences from other senses. Screen/phone use in cars likely shifts drivers’ attention away from the road and contributes to risk of accidents. Dashboard-mounted touchscreen tablets are now common in vehicles.
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