Tag Archives: Geometric-optical illusions

Failing to See the Illusion

Every year, there is a competition for who can come up with the best ‘illusion’:


This year’s winner is a dynamic variant of the Ebbinghaus Illusion (by Christopher D. Blair, Gideon P. Caplovitz, and Ryan E.B. Mruczek at University of Nevada Reno):

There are several runners-up including one called ‘A Turn in the Road’ (by Kimberley D. Orsten and James R. Pomerantz, Rice University, Houston):


I can see the dynamic Ebbinghaus effect (although not sure of the difference in seeing it from the side).

However, try as I might I have not been able to see the illusion in the ‘Turn in the Road’.

I don’t see how rearranging the different images alters which one seems to be the odd one out. When the video finishes with an overlap it is unsurprising.

But I think I know what I am supposed to experience. And, perhaps, what is being assumed to be behind this alleged experience.

Spatial illusions and Temporal Illusions (I): Three Dimensions

Previous: what does an illusion of x show?

Previous: complexity-illusions and simplicity-illusions

This project concerns the relationship between time and illusion. However, a great deal of impressive illusions demonstrate illusions of spatial properties. How one might otherwise categorize these spatial illusions depends on one’s metaphysical position on space. But, it also depends on one’s metaphysical position on time.

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