- Struggling to decide
- Competition in group decision-making
- Award date
- 16 November 2017
- Number of pages
- Document type
- PhD thesis
- Faculty of Social and Behavioural Sciences (FMG)
- Psychology Research Institute (PsyRes)
In this dissertation, it is examined how cooperation and competition affect the way groups exchange and process information, and how this – in turn – affects groups’ decision-making quality. Answering this question is important because competition is ubiquitous in group interactions and such competition affects groups’ ability to execute their tasks. In this dissertation, the results of six studies are presented that include 1251 participants who were organized in 417 three-person groups. The content of this empirical work is organized under three main questions that have so-far remained unanswered: (1) What is the neurobiological basis of group decision-making? (Chapter 2). To answer this first question the influence of the neuropeptide oxytocin is examined. Oxytocin is a hormone that can facilitate cooperative behavior. This work provides a fairly unique insight into how groups function at a basic biological level, as opposed to the social and motivational factors which have been investigated in much greater detail in the past. (2) How do groups deal with external information, and how is this affected by competition? (Chapter 3 & 4). This second question places group decision-making in a larger context that also includes outside information, when groups are confronted with information coming from a non-group member. (3) How does competition within and between groups affect information exchange, and decision-making quality? (Chapter 5). This third question examines more closely how information exchange in groups is affected by competition between group members, either in the presence or the absence of competition with another group (intergroup competition).
Thesis (complete) (Embargo up to and including 16 May 2019)
Chapter 3: The anchoring-bias in groups (Embargo up to and including 16 May 2019)
Chapter 4: Advice-taking in groups (Embargo up to and including 16 May 2019)
Chapter 5: Intergroup competition improves group decision-making quality (Embargo up to and including 16 May 2019)
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