University of Illinois Urbana-Champaign

The Role of Expert Advice Formation Individual and Group Decision Making

Rantilla, Adrian Kramer

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https://hdl.handle.net/2142/82324

Description

Title
The Role of Expert Advice Formation Individual and Group Decision Making
Author(s)
Rantilla, Adrian Kramer
Issue Date
2000
Doctoral Committee Chair(s)
  • Budescu, David V.
  • Davis, James H.
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Psychology, Cognitive
Language
eng
Abstract
This paper examined individual and group level layperson decision making when information from multiple experts is available. A total of 767 participants read four scenarios with various forms of expert advice, and then made decisions and gave confidence ratings. As expert advice format became more precise (ambiguous statements to numerical probabilities), individuals and groups tended to make more nearly optimal decisions, with higher consensus across decision makers. However, decision confidence and satisfaction peaked when expert advice was in a verbal form, which was not the most precise form. In a surprising contrast to most group research, group level confidence ratings did not differ significantly from those of individual decision makers, nor did groups make substantially better decisions. Implications of these results for selection of expert advisor presentation format are discussed.
Graduation Semester
2000
Type of Resource
text
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http://hdl.handle.net/2142/82324

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