The "Less-Is-More" effect in group decision making (2013)
Authors
Abstract
Many studies indicate that group discussion can disproportionately reflect information known by all group members, at the expense of information known to only one group member, and this is associated with suboptimal group decisions (Stasser & Titus, 1985). The present study examined the impact of 3 procedural factors on information sharing and quality of group decision: (a) group decision procedure (an instruction to "rank order the alternatives" vs "choose the best alternative", (b) information access during group discussion (reliance on memory vs complete access), and (c) communication technology (computer vs face to face). Three-person groups worked on an investment decision that was structured as a hidden-profile task where critical information was distributed unevenly prior to group discussion. Data support a rank-order effect: Groups instructed to rank order the alternatives, compared to groups instructed to choose the best alternative, were more likely to fully consider all of the alternatives, exchange information about unpopular alternatives, and make the best decision. But these effect occurred only in face-to-face groups. In computer-mediated groups, there was general information suppression and no effect of group decision procedure.…
Bibliographic entry
Luan, S., Katsikopoulos, K. V., & Reimer, T. (2013). The "Less-Is-More" effect in group decision making. In R. Hertwig, U. Hoffrage, & the ABC Research Group, Simple heuristics in a social world (pp. 293-317). New York, NY: Oxford University Press.
Miscellaneous
| Publication year | 2013 | |
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| Document type: | In book | |
| Publication status: | Published | |
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