Among psychologists and vision scientists, binocular rivalry has enjoyed sustained interest for decades dating back to the 19th century (see "Wheatstone's Discovery"). In recent years, rivalry's audience has expanded to include neuroscientists who envision rivalry as a "tool" for exploring the neural concomitants of conscious visual awareness and perceptual organization. This webpage provides students of binocular rivalry with demonstrations -- and brief explanations -- for some of rivalry's hallmark characteristics. More detailed discussion of the spatial and temporal dynamics of binocular rivalry are contained in R. Blake's recent article, which can be downloaded by clicking here. In addition, interested students of rivalry should consult Robert O'Shea's excellent, up-to-date website providing a comprehensive list of published papers dealing with binocular rivalry. For a nicely illustrated description of stereo transparency and rivalry, see Rolf Henkel's webpage.
Each demonstration consists of a pair of
grayscale pictures designed
to be viewed dichoptically using the
'free fusion' technique (i.e.,
either crossing your eyes or diverging
your eyes to bring the
two images into binocular coincidence). People
unfamiliar with
this technique can consult this website for a brief
tutorial.
Some of the grayscale demonstrations are static images, but
others
are QuickTime movies; to experience these demonstrations
your
browser needs to be outfitted with the QuickTime
plug-in.
Besides the grayscale/free-fusion versions, some
of the
demonstrations on this webpage can be experienced by viewing
the
left- and right-eye images using analghypic (red/green)
glasses.
Inexpensive pairs of these can be obtained from Berezin Stereo.