Crowd control: Reducing individual estimation bias by sharing biased social information.

In the Shifted-Median treatment the improvement in collective accuracy is substantially higher and highly significant ( p 0 = 0 for 10,000 bootstrap runs, see the bootstrapped distribution in Fig N top right panel in S1 Appendix ).

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We observe no significant improvement in the Random and Median treatments ( p 0 = 0.28 and 0.44, respectively), and a marginal improvement in the Shifted-Median treatment, although not clearly significant ( p 0 = 0.06; see Fig S top row in S1 Appendix ).

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