Illusion Sciences: why are we surprised by the memory illusion pdf some of the things that we see? Arthur Shapiro blogging on research-generated phenomena. A new illusion whenever I can get around to it.
That’s right—similar address but “Science” instead of “Sciences. Thank you for visiting this page. Here is a video concerning my illusion contest entry from 2014. I made the video in a hurry.
Steve Macknik called and said they needed a video to accompany an upcoming Scientific American Blog post. I made a quick screencast discussing the illusion. I haven’t posted for a looooooooong time . My goal is to create videos about my illusions, post them on my youtube channel, and post them here.
Here is the first video after my seven year hiatus: The star wars scroll illusion. I made the video as an entry for the 2015 Best Illusion of the Year contest. The video feels somewhat incomplete since I have several fun variants of the illusion that could not fit into the time limit for the contest. As it stands, the Star Wars Scroll is simply a dynamic version of Fred Kingdom’s “Leaning Tower of Pisa” illusion. Nonetheless the Star Wars scroll illusion is interesting to play with because the effects are dynamic and so powerful.
I hope you enjoy the video. You are looking at two spinning rings. When you look directly at the display, you perceive the rotation of the ovals. When you look toward the red dot or the yellow dot, you perceive the rotation of the internal lines in the ring that is further away from the dot. In the rotating reversals demonstration above, the global motion of the ovals is pitted against the internal motion of the lines. To see what I mean, let’s take a look at one ring by itself in the demonstration below. There are two sources of information.
In other words, will perception be guided by the motion of the ovals? Or by the motion of the internal lines? Or by a combination of these two? Or will you be able to see both types of motion at the same time, while keeping their signals separate?
But when you look at this display peripherally, it becomes difficult to separate the two sources of information, and the internal motion drives the perceived direction of the ring. To look at the display with your peripheral vision, focus your eyes on a spot a few inches above the display. In the two-ring display, I simply flipped one of the rings so that there would be a conflict in perceived direction of motion when you focus on one dot or the other. The foveal visual system is quite different from the peripheral visual system. But a blurry peripheral perception alone does not seem to explain why the disks appear to reverse direction.
When you look toward the red dot or the yellow dot, the video feels somewhat incomplete since I have several fun variants of the illusion that could not fit into the time limit for the contest. In the real world – here is a video concerning my illusion contest entry from 2014. My goal is to create videos about my illusions, press the button to put red vertical lines on the display. I moved the illusion files to a different host site, i made a quick screencast discussing the illusion.