I'd love to know in what cars they did that study. Even I, someone who is highly vigilant when driving, don't necessarily pay any attention to what is going on around the vehicle if I am not the one driving. In fact if I am in a car with the typical hesitant, nervous, slow thinking driver I don't want to see what is going on. I've also never encountered a passenger who stops talking simply because I am paying attention to the road. I can understand that having a phone in hand while driving could potentially hamper ones ability to operate the vehicle, but [highlight]I find no difference between talking to other people in the vehicle versus talking to someone on a phone, since I can not see the person to whom I am speaking in either case nor can I employ hand gestures[/highlight]. Tapping on a phone screen to answer a call to me is no different to making adjustments to the radio or operating various other controls in the vehicle.