Information aggregation in groups : the approach of simple group heuristics (SIGH)

Details

Serval ID
serval:BIB_2BC70CC29082
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Title
Information aggregation in groups : the approach of simple group heuristics (SIGH)
Title of the conference
Proceedings of the Twenty-Fifth Annual Conference of the Cognitive Science Society
Author(s)
Reimer T., Hoffrage U.
Publisher
Erlbaum
Address
Boston, MA
ISBN
0-8058-4991-2
Publication state
Published
Issued date
2003
Editor
Alterman R., Kirsch D.
Pages
982-987
Language
english
Abstract
A new framework is introduced that models group decision making by using simple group heuristics (SIGH). We report results of a set of simulations that systematically varied (a) the group members' strategies (compensatory unit weight model, UWM, and a noncompensatory lexicographic heuristic, LEX), (b) the distribution of cue validities (J-shaped vs. linear), and (c) the quantity and quality of shared information. Individual decisions were aggregated by using a majority decision rule (proportionality in case of ties). (1) The simulations revealed strong effects of the distribution of cue validities on group performance. When validities were linearly distributed, UWM gained an 8% better accuracy than LEX by considering all cues. Yet, if cue validities followed a J-shaped distribution, the much more frugal LEX surpassed the UWM by achieving a 16% higher accuracy. (2) This effect was robust across different quantities of shared information. (3) Systematic allocation of information in favour of valid or invalid cues showed that the performance of UWM mainly depended on mean validity, whereas the performance of LEX was more strongly affected by the degree to which the most valid cues were shared.
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Create date
24/02/2009 15:34
Last modification date
20/08/2019 14:11
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