Web Science/Part2: Emerging Web Properties/Collective Intelligence

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9th week due Jan 10th


The Web as a Social Machine: Collective intelligence and Human Computing[edit]

Definition of collective intelligence Examples of collective intelligence

  • pagerank

Mechanisms behind collective intelligence

  • "natural" distributions
* e.g. Gaussian error for estimating size of an object
* e.g. natural bias toward positive for evaluation of products (where do we re-find a paper for this?)
  • "averaging" in some sense
* high enough systematic error leads to optimal estimation
  • independent assessment!

Google Flu Trends and its Limits http://www.sueddeutsche.de/wissen/big-data-google-versagt-bei-grippe-vorhersagen-1.1912226 http://www.nature.com/nature/journal/v457/n7232/abs/nature07634.html http://www.sciencemag.org/content/343/6176/1203

Models of attention

  • attention models (Lehrman)


Conclusion:

  • Collective intelligence may be jeopardized by the social setup of the system