Susan J. Boyce, Alexander Pollatsek, and Keith Rayner.
 <b>Effect of Background Information on Object Identification</b>.
 <em>Journal of Experimental Psychology: Human Perception and
  Performance</em>, 15(3):556--566, 1989.
  <a href="http://vis.cs.brown.edu/docs/pdf/bib/g/Boyce-1989-EBI.pdf.html">(pdf)</a>
  <a href="http://vis.cs.brown.edu/results/bibtex/Boyce-1989-EBI.bib">(bibtex:
  Boyce-1989-EBI)</a>.