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

Détails

ID Serval
serval:BIB_2BC70CC29082
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Titre
Information aggregation in groups : the approach of simple group heuristics (SIGH)
Titre de la conférence
Proceedings of the Twenty-Fifth Annual Conference of the Cognitive Science Society
Auteur⸱e⸱s
Reimer T., Hoffrage U.
Editeur
Erlbaum
Adresse
Boston, MA
ISBN
0-8058-4991-2
Statut éditorial
Publié
Date de publication
2003
Editeur⸱rice scientifique
Alterman R., Kirsch D.
Pages
982-987
Langue
anglais
Résumé
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.
Web of science
Création de la notice
24/02/2009 15:34
Dernière modification de la notice
20/08/2019 14:11
Données d'usage