I got this little gem out of ‘Parents’ magazine (it was all they had at the doctor’s office to read. I swear):
Researchers from Western Washington University compared people talking on cell phones to people strolling alone, in pairs, or listening to iPods. Only 25% of the walking cell phone talkers noticed a unicycling clown nearby, compared to the 71% of the pairs who took note of the unusual site!! Come on folks, it’s a unicycling clown! How can you miss it??
Cell phone users also had trouble simply walking; they were slower, more prone to weaving, and rarely acknowledged other people.