Boston Globe, Nov. 23, 2008 by Rebecca Tuhus-Dubrow
http://www.boston.com/bostonglobe/ideas/articles/2008/11/23/group_think?mode=PF
In online searches, the researcher tends to follow hyperlink to hyperlink, in a journey that resembles “a plunge down a rabbit hole,” in the words of Robert Berring, a law professor at the University of California at Berkeley who has studied the impact of electronic media. “If you get to an index, a table of contents, you see the environment that surrounds it. In the culture of paper, a lot of these signals are important.”