Web Science/Part2: Emerging Web Properties/Collective Intelligence

The Web as a Social Machine: Collective intelligence and Human Computing
Definition of collective intelligence Examples of collective intelligence Mechanisms behind collective intelligence * 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?) * high enough systematic error leads to optimal estimation
 * pagerank
 * "natural" distributions
 * "averaging" in some sense
 * 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