Cognitive distraction isn't a term I have heard but it fits.
A large percentage of the problems with driving while on the phone come from the conversation and not from actually holding the phone. Making calls and answering is where the headsets come in handy.
If phone calls weren't dangerous the state here wouldn't have a box on the accident forms for "using phone" as a contributing factor to the accident.
Keep the calls short and to the point. No arguments, political discussions and heavy thinking is the safest way to drive while talking.
Joe
JC Custom WoodWorks
For best results, try not to do anything stupid.
"So this is how liberty dies...with thunderous applause." - Padmé Amidala "Star Wars III: The Revenge of the Sith"