I read about the following experiment in a recent NYTimes article. Researchers were interested in the effect of cellphone use on an individual's...

I read about the following experiment in a recent NYTimes article. Researchers were interested in the effect of cellphone use on an individual's willingness to assist others. On a street in Manhattan a man (apparently) using crutches dropped his newspaper and had obvious difficulty picking it up. An observer recorded whether a person passing the man was (a) on a cellphone, and (b) whether or not the person retrieved the man's newspaper for him. Over the course of a week, this scenario was repeated many times. Of the 48 people who were on a cellphone, 19 retrieved the newspaper. Of the 205 people who were not on a cellphone, 134 retrieved the newspaper.