Julien Clinton (Clint) Sprott, 1993

First study to document the correlation between aesthetics and fractal dimension and Lyapunov exponents. Images were chaotic attractors of discrete dynamical systems (iterations).

Deborah Aks and Sprott, 1996

Extended the study to more subjects and to look for individual differences in preference.
Revised 29 March 2005 by Ralph Abraham, <abraham@vismath.org>