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- W2893006449 abstract "How effective groups are in making decisions is a long-standing question in studying human and animal behaviour. Despite the limited social and cognitive abilities of younger people, skills which are often required for collective intelligence, studies of group performance have been limited to adults. Using a simple task of estimating the number of sweets in jars, we show in two experiments that adolescents at least as young as 11 years old improve their estimation accuracy after a period of group discussion, demonstrating collective intelligence. Although this effect was robust to the overall distribution of initial estimates, when the task generated positively skewed estimates, the geometric mean of initial estimates gave the best fit to the data compared to other tested aggregation rules. A geometric mean heuristic in consensus decision making is also likely to apply to adults, as it provides a robust and well-performing rule for aggregating different opinions. The geometric mean rule is likely to be based on an intuitive logarithmic-like number representation, and our study suggests that this mental number scaling may be beneficial in collective decisions." @default.
- W2893006449 created "2018-10-05" @default.
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- W2893006449 date "2018-09-24" @default.
- W2893006449 modified "2023-09-26" @default.
- W2893006449 title "Adolescents show collective intelligence which can be driven by a geometric mean rule of thumb" @default.
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- W2893006449 doi "https://doi.org/10.1371/journal.pone.0204462" @default.
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