They're not convinced that it impairs their driving. Consider that a plurality, if not a majority of the population is convinced that they're efficient at mult

They're not convinced that it impairs their driving. Consider that a plurality, if not a majority of the population is convinced that they're efficient at multi-tasking, and specifically that they can perform each task as well as in isolation. But we know that almost nobody multitasks well, period, and absolutely not with equivalent performance.