Interruptibility for In-vehicle Multitasking: Influence of Voice Task Demands and Adaptive Behaviors
summary
Study analyzes data from 29 drivers doing proactive voice tasks under three levels of secondary-task demand and four maneuvers (STOP, STRAIGHT, TURN, LANE CHANGE). Findings show secondary-task demand reliably reduces perceived difficulty and auditory-verbal performance, while driving-safety interruptibility stays flat for STRAIGHT and TURN. Common adaptations are speed reduction improves interruptibility and pausing secondary tasks; speed drops more during TURN and in interruptible cases. Proposes flow-control to limit voice demand and shorten utterances, which increases safe interruptibility.
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