Information flow and influence during collective search, discussion, and choice


Abele, Susanne ; Vaughan-Parsons, Sandra I. ; Stasser, Garold


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URL: http://ub-madoc.bib.uni-mannheim.de/2341
URN: urn:nbn:de:bsz:180-madoc-23413
Document Type: Working paper
Year of publication: 2008
Publication language: English
Institution: School of Law and Economics > Sonstige - Fakultät für Rechtswissenschaft und Volkswirtschaftslehre
MADOC publication series: Sonderforschungsbereich 504 > Rationalitätskonzepte, Entscheidungsverhalten und ökonomische Modellierung (Laufzeit 1997 - 2008)
Subject: 150 Psychology
Classification: JEL: D83 D23 M51 L84 ,
Subject headings (SWD): Informationsverhalten , Gruppenentscheidung , Entscheidungsverhalten
Keywords (English): Information Sharing , Cognitive Centrality , Group Decision Making , Collective Choice , Archival Data
Abstract: If decision-relevant information is distributed among team members, the group is inclined to focus on shared information and to neglect unshared information, resulting often in suboptimal decisions. This classical finding is robust in experimental settings, in which the distribution of information is created artificially by an experimenter. The current paper looks at information sharing effects when access to information is not restricted, and decision makers are very familiar with the decision task. We analyzed archival search and discussion data obtained from business executives completing a personnel selection exercise. Information popularity in the population from which groups were composed predicted number of group members accessing items during information searches and whether the group discussed the items. The number of group members who accessed an item predicted whether information was repeated during discussion, and repetition predicted which items were included on an executive summary. Moreover, cognitively central group members were more influential than cognitively peripheral members. One implication is that collective decision making amplifies what is commonly known at the expense of disseminating what is not.
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Abele, Susanne ; Vaughan-Parsons, Sandra I. ; Stasser, Garold (2008) Information flow and influence during collective search, discussion, and choice. Open Access [Working paper]
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