If news is posted on the Internet, it is considered old after 36 hours, says Albert-Lászlo Barabási,
Notre Dame professor of physics. With colleagues in Hungary, he conducted a study of how
people acquire information from the web.
In an article published recently in the journal Physical Review E, the Notre Dame expert
on complex networks and his co-authors report that within a day-and-a-half of an article's
posting, half of its total readership will have read it. While that may seem like a short shelf life,
it's much longer than the two to four hours conventional wisdom would predict.
The physicists reached their conclusions by reconstructing the month-long browsing
history of 250,000 visitiors to a popular Hungarian news and entertainment website. To protect
the privacy of the website's visitors, the researchers were supplied with numbers rather than
Internet addresses.
The study also revealed that people read news articles in bursts rather than uniformly
throughout the day. Barabási has found this same distinctive burst of activity in correspondence
and phone-call patterns. "What we find when we look at one particular individual is not uniform
in time," the Notre Dame physicist said in a New York Times article on his research. "There are
short periods of lots of clicks and then long periods of nothing."
(January 2007)
