HOW many different things can you do at once?
One American president supposedly couldn’t walk and chew gum at the same
time, but we all have our limits. One of the few things that cognitive
psychologists agree on is that human information processing capacity is tightly
constrained. The brain is not incapable of doing two things at once, but if they
both require conscious attention there will be a price: you won’t do them as
well together as you would separately.
So why do so many people think that it is safe to conduct a telephone
conversation while driving a…
