Here's an experiment you can try. But please be the scientist and not the test subject.
Watch people cross the street and note whether they're yakking on the phone, texting or bopping to tunes while they do it. If you're really ambitious, time how long it takes them to cross.
This past summer researchers from the University of Washington did it. They watched more than 1,100 pedestrians at the 20 intersections in Seattle that racked up the most pedestrian injuries over the last three years.