I didn't see the effect until I moved my head back. The importance of viewing distance suggests a spatial frequency effect. This looks like a a bistable figure (like Rubin's Vase) in which the figure-ground relationship depends on spatial frequency.
There is a photo floating about in which the person appears either happy or angry depending on your viewing distance.
Ken Annette Taylor, Ph. D. wrote:
I was sent the attached picture, I hope it can go through to tips. I'd love to know what causes the effect. Annette ====================================================================== Sent: Monday, November 13, 2006 3:56 PM Subject: Fwd: hidden message If you cannot decipher anything, then try pulling the corners of your eyes as if you were Chinese. ----- End forwarded message ----- Annette Kujawski Taylor, Ph. D. Professor of Psychology University of San Diego 5998 Alcala Park San Diego, CA 92110 619-260-4006 [EMAIL PROTECTED]
-- --------------------------------------------------------------- Kenneth M. Steele, Ph.D. [EMAIL PROTECTED] Professor Department of Psychology http://www.psych.appstate.edu Appalachian State University Boone, NC 28608 USA --------------------------------------------------------------- --- To make changes to your subscription go to: http://acsun.frostburg.edu/cgi-bin/lyris.pl?enter=tips&text_mode=0&lang=english
