Thanks Stephen! Has anyone matched my experience. I easily managed to get the dancer to switch directions. So I didn't think much more about it. When Stephen reposted this, I looked at it again. I could still reverse the image easily enough. I kept staring and tried to restore the original spin. I could not do it!! Is it just me? :) Tim _______________________________ Timothy O. Shearon, PhD Professor and Chair Department of Psychology The College of Idaho Caldwell, ID 83605 email: [EMAIL PROTECTED]
teaching: intro to neuropsychology; psychopharmacology; general; history and systems "What we have done for ourselves alone dies with us; what we have done for others and the world remains and is immortal." - Albert Pike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Sun 2/10/2008 3:59 PM To: Teaching in the Psychological Sciences (TIPS) Subject: Re: [tips] Never Seen This One Before--More I just posted a url for the dancer illusion we've been discussing here at: http://www.news.com.au/perthnow/story/0,21598,22492511-5005375,00.html Following-up on my own post, it (possibly foolishly) occurred to me that perhaps it's not an illusion at all, that the originator somehow introduced random switching into the display. I don't know if this kind of programming is possible in an animated gif, but there's an easy way to distinguish it from an illusion. If everyone watching at the same time perceives the same direction of rotation and the switch simultaneously, then it's not an illusion. I just watched it with my wife. There was no correspondence of switch time or direction of rotation between us. It's an illusion, all right. QED. AAP (Australian Associated Press) which is credited with the illusion, has an image bank. I just searched it and failed to find it there. Stephen ----------------------------------------------------------------- Stephen L. Black, Ph.D. Professor of Psychology, Emeritus Bishop's University e-mail: [EMAIL PROTECTED] 2600 College St. Sherbrooke QC J1M 1Z7 Canada ----------------------------------------------------------------------- --- To make changes to your subscription contact: Bill Southerly ([EMAIL PROTECTED]) --- To make changes to your subscription contact: Bill Southerly ([EMAIL PROTECTED])
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