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Uninformed individuals promote democratic consensus in animal groups

Research output: Contribution to journalArticle

Translated title of the contributionUninformed individuals promote democratic consensus in animal groups
Original languageEnglish
Pages (from-to)1578 - 1580
Number of pages3
JournalScience
Volume334
Issue number6062
DOIs
DatePublished - Dec 2011

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.

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