Jump to ContentJump to Main Navigation
Ecological RationalityIntelligence in the World$
Users without a subscription are not able to see the full content.

Peter M. Todd and Gerd Gigerenzer

Print publication date: 2012

Print ISBN-13: 9780195315448

Published to Oxford Scholarship Online: May 2012

DOI: 10.1093/acprof:oso/9780195315448.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 09 December 2021

How Groups Use Partial Ignorance to Make Good Decisions

How Groups Use Partial Ignorance to Make Good Decisions

7 How Groups Use Partial Ignorance to Make Good Decisions
Ecological Rationality

Konstantinos V. Katsikopoulos

Torsten Reimer

Oxford University Press

Is prior recognition of decision options used when a group of people tries to decide together which option to choose? And if it is used, how does it affect group performance? To find out, mathematical models of majority and lexicographic decision making were developed using different assumptions about how groups use recognition information. Based on the models, precise predictions were made for when the less-is-more effect (where less information leads to more accuracy) would occur in groups. The psychological plausibility of the models was also tested with groups of three people. Experimental results indicate that (a) members who can use the recognition heuristic are—in most but not all cases—more influential in the group decision process than members who cannot use the heuristic, and (b) the less-is-more effect can occur at the group level.

Keywords:   Condorcet jury theorem, consensus, less-is-more effect, lexicographic strategy, majority rule, group decision making, recognition heuristic

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .