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Artificial Life

Quarterly (Winter, Spring, Summer, Fall)
125 pp. per issue, 7 x 10,
illustrated
Founded: 1993
ISSN 1064-5462
E-ISSN 1530-9185
2008 ISI Impact Factor: 1.164  

Artificial Life

Spring 2004, Vol. 10, No. 2, Pages 181-190
Posted Online March 11, 2006.
(doi:10.1162/106454604773563603)
© 2004 Massachusetts Institute of Technology
Influence of Chance, History, and Adaptation on Digital Evolution

Daniel A. Wagenaar

Department of Physics 103-33 California Institute of Technology, Pasadena, CA 91125

Christoph Adami

Digital Life Laboratory 136-93 California Institute of Technology, Pasadena, CA 91125

Present address: Keck Graduate Institute for Applied Life Sciences, 535 Watson Drive, Claremont, CA 91711.

PDF (115.392 KB) PDF Plus (138.636 KB)

We evolved multiple clones of populations of digital organisms to study the effects of chance, history, and adaptation in evolution. We show that clones adapted to a specific environment can adapt to new environments quickly and efficiently, although their history remains a significant factor in their fitness. Adaptation is most significant (and the effects of history less so) if the old and new environments are dissimilar. For more similar environments, adaptation is slower while history is more prominent. For both similar and dissimilar transfer environments, populations quickly lose the ability to perform computations (the analogue of beneficial chemical reactions) that are no longer rewarded in the new environment. Populations that developed few computational “genes” in their original environment were unable to acquire them in the new environment.

Cited by

Nicolas Chaumont, Richard Egli, Christoph Adami. (2007) Evolving Virtual Creatures and Catapults. Artificial Life 13:2, 139-157
Online publication date: 1-Apr-2007.
Abstract | PDF (459 KB) | PDF Plus (257 KB) 
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