Micro-bias and macro-performance

• Published in: The European physical journal. B, Condensed matter physics Vol. 67; no. 3; pp. 369 - 375
• Main Authors: Seaver, S. M.D., Moreira, A. A., Sales-Pardo, M., Malmgren, R. D., Diermeier, D., Amaral, L. A.N.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-02-2009; EDP Sciences
• Subjects: Complex Systems; Condensed Matter Physics; Exact sciences and technology; Fluid- and Aerodynamics; Interdisciplinary Physics; Physics; Physics and Astronomy; Solid State Physics; 87.23.Ge Dynamics of social systems; 89.75.-k Complex systems; Positions; Modelling; Performance; Classification
• ISSN: 1434-6028; 1434-6036
• DOI: 10.1140/epjb/e2008-00406-4

We use agent-based modeling to investigate the effect of conservatism and partisanship on the efficiency with which large populations solve the density classification task – a paradigmatic problem for information aggregation and consensus building. We find that conservative agents enhance the populations’ ability to efficiently solve the density classification task despite large levels of noise in the system. In contrast, we find that the presence of even a small fraction of partisans holding the minority position will result in deadlock or a consensus on an incorrect answer. Our results provide a possible explanation for the emergence of conservatism and suggest that even low levels of partisanship can lead to significant social costs.