I agree with your argument, specifically when it comes to driving. The resource model of attention suggests that people have a restricted capacity for paying attention. Selective attention has been studied by using dichotic arrangements (simultaneous stimulation of both ears with different sounds or messages). In such studies, participants are instructed to focus on the information from a particular hear (attended channel), and has ignored input from the other ear (unattended channel). Results have shown that when people do this, they are able to recall part of the message from the attended ear, but lost most of the information that derived from the unattended ear. Similar studies have been done with vision. When people are led to focus on
