Nonlinear Sciences – Adaptation and Self-Organizing Systems
Scientific paper
2010-01-11
Theory Biosci. 129 (2010): 271--282
Nonlinear Sciences
Adaptation and Self-Organizing Systems
21 pages, 16 figures; Accepted version, to appear in "Theory in Biosciences"
Scientific paper
A competitive learning model was introduced in Ref. 1 (A. Mehta and J. M. Luck, Phys. Rev. E 60, 5, 1999), in which the learning is outcome-related. Every individual chooses between a pair of existing strategies or types, guided by a combination of two factors: tendency to conform to the local majority, \em{and} a preference for the type with higher perceived success \em{among its neighbors}, based on their relative outcomes. Here, an extension of the \em{interfacial model} of Ref. 1 is proposed, in which individuals additionally take into account their \em{own} outcomes in arriving at their outcome-based choices. Three possible update rules for handling bulk sites are considered. The corresponding phase diagrams, obtained at coexistence, show systematic departures from the original interfacial model. Possible relationships of these variants with the \em{cooperative model} of Ref. 1 are also touched upon.
Mahajan Gaurang
Mehta Anita
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