Browsing archives for 'Estimation'

How The Ames Room Illusion Works

Estimation,Video 4 September 2014 0 Comments

How The Ames Room Illusion Works

In this brief video from Scientific American, the Ames Room illusion is demonstrated and then completely revealed.  If you are not familiar with an Ames Room, first have a look at this vintage Ames Room illusion photograph.  Now watch the video and see exactly how this trick is done.

Major Drapkin Illusion Card #18 – The Rod Illusion

Estimation 9 July 2014 0 Comments

Major Drapkin Illusion Card #18 – The Rod Illusion

Today’s illusion comes to us straight from the “Roaring ’20s”.   It is the 18th card in a series of 25 optical illusion cards published in 1926 by Major Drapkin & Co (London) which was a branch of The United Kingdom Tobacco Co Ltd.   The reverse side of the card contains the following: Which is […]

A Turn in the Road

Estimation,Video 5 June 2014 0 Comments

A Turn in the Road

Last week, we posted the first place winner of the 2014 Best Illusion of the Year Contest.  Today’s illusion is the third place winner called ‘A Turn in the Road’ by Kimberley D. Orsten and James R. Pomerantz from Rice University in Houston, Texas.  This illusion video shows three images, two of which are matching images […]

The Dynamic Ebbinghaus Illusion

Estimation,Video 30 May 2014 0 Comments

The Dynamic Ebbinghaus Illusion

The 10th annual edition of the Best Illusion of the Year contest was held on May 18, 2014 in St. Petersburg, Florida.  Taking home the prestigious first place prize were Christopher D. Blair, Gideon P. Caplovitz, and Ryan E.B. Mruczek from the University of Nevada Reno.  Their illusion was a new twist on an old […]

Relative Size Animated Optical Illusion

Animation,Estimation 6 March 2014 0 Comments

Relative Size Animated Optical Illusion

Perspective matters.  The angled lines in the animation presented below give the impression that the floor is sloping downward to the left.  As such, the man standing on the left appears to be much shorter than the man standing on the right.  As the man on the left walks up the incline to stand directly […]

Twisting Spiral

Estimation,Motion 13 January 2014 0 Comments

Twisting Spiral by Gianni Sarcone

Take a look at the spiral created by Gianni A. Sarcone below.  Does it appear to be moving in a clockwise direction? Now start on the outside and follow the lines that make up the spiral around in a clockwise direction.  Do they spiral to the middle?  Or is this really made from a series […]

Pinna’s Illusory Intertwining Effect

Estimation 9 December 2013 0 Comments

Pinna's illusory intertwining effect

This figure looks like a warped spiral made up of white and black squares on a gray background.  If you examine it more closely, however, you will find that it is actually made up of four concentric circles.  This illusion was first described by Baingio Pinna and Richard L Gregory in a 2002 article titled […]