Roger Shepard's Rotated Table Illusion
Visually elaborated
(DRAFT: Liable to change)

Aaron Sloman
School of Computer Science, University of Birmingham.

Installed: 3 Feb 2013
Last updated: 3 Feb 2013, 19 Sep 2016; 20 Nov 2016
This document is

A partial index of discussion notes is in

Previous versions of the illusion online

The image was drawn using William Chia-Wei Cheng's (Bill Cheng's) ancient, but still very
useful drawing program, Tgif. Tgif is an interactive 2-D drawing tool under X11, available
for Linux and most UNIX platforms. (I use it on various versions of Fedora.)

NOTE: This diagram was used, with my permission, in the following book:
William Kaplan, Why Dissent Matters: Because Some People See Things the Rest of Us Miss
McGill-Queen's University Press (June 1 2017)

This web site will be absorbed into the Meta-morphogenesis project's goal of tracing
changes in information processing across biological evolution, development and learning.
     (On the importance of abilities to see what's possible and not possible.)

Recommended Reading
(To be expanded)

Maintained by Aaron Sloman
School of Computer Science
The University of Birmingham