Uninformed individuals promote democratic consensus in animal groups

Couzin, I. D., Ioannou, C. C., Demirel, G., Gross, T., Torney, C. J. , Hartnett, A., Conradt, L., Levin, S. A. and Leonard, N. E. (2011) Uninformed individuals promote democratic consensus in animal groups. Science, 334(6062), pp. 1578-1580. (doi:10.1126/science.1210280) (PMID:22174256)

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Abstract

Conflicting interests among group members are common when making collective decisions, yet failure to achieve consensus can be costly. Under these circumstances individuals may be susceptible to manipulation by a strongly opinionated, or extremist, minority. It has previously been argued, for humans and animals, that social groups containing individuals who are uninformed, or exhibit weak preferences, are particularly vulnerable to such manipulative agents. Here, we use theory and experiment to demonstrate that, for a wide range of conditions, a strongly opinionated minority can dictate group choice, but the presence of uninformed individuals spontaneously inhibits this process, returning control to the numerical majority. Our results emphasize the role of uninformed individuals in achieving democratic consensus amid internal group conflict and informational constraints.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Torney, Dr Colin
Authors: Couzin, I. D., Ioannou, C. C., Demirel, G., Gross, T., Torney, C. J., Hartnett, A., Conradt, L., Levin, S. A., and Leonard, N. E.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Science
Publisher:American Association for the Advancement of Science
ISSN:0036-8075
ISSN (Online):1095-9203

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