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Sc po some-10-crowds

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Publié dans : Technologie, Business

Sc po some-10-crowds

  1. 1. Social Media: Behind the Scenes 2013 week 10
  2. 2. Online Crowds Fundamentals
  3. 3. context
  4. 4. fundamental structure of society evolution
  5. 5. sociology economics marketing politics
  6. 6. Sir Francis Galton (1822-1911)
  7. 7. statistical correlation questionnaires surveys statistician meteorology forensic eugenics Sir Francis Galton (1822-1911)
  8. 8. ?
  9. 9. ! ? x 787
  10. 10. 1,197 pounds 1,198 pounds
  11. 11. Ask a friend 65% Ask the audience 91%
  12. 12. January 28, 1986
  13. 13. Builds the shuttle’s fuel tank Builds the shuttle Fuel and components Manages ground support
  14. 14. -3% -6% -6% -5% 20min
  15. 15. -3% -3% -12% -3% end of day
  16. 16. months later
  17. 17. James Surowiecki
  18. 18. The Wisdom of Crowds Why the Many Are Smarter Than the Few and How Collective Wisdom Shapes Business, Economies, Societies and Nations. James Surowiecki
  19. 19. Wisdoms Coordination Cooperation Cognition
  20. 20. Types of crowd wisdom Coordination
  21. 21. Types of crowd wisdom Coordination
  22. 22. Types of crowd wisdom How groups of people can form networks of trust without a central system Cooperation
  23. 23. Types of crowd wisdom Thinking and information Processing Cognition
  24. 24. on aN Qu ine S om isd dW ow Cr
  25. 25. Diversity
  26. 26. Diversity Each person should have private information even if it's just an eccentric interpretation of the known facts.
  27. 27. Decentralization
  28. 28. Decentralization People are able to specialize and draw on local knowledge.
  29. 29. Aggregation
  30. 30. Some mechanism exists for turning private judgments into a collective decision. Aggregation
  31. 31. Independance
  32. 32. Independance People's opinions aren't determined by the opinions of those around them.
  33. 33. om isd dW row C RE ILU FA
  34. 34. Homogeneity
  35. 35. Homogeneity Groupthink
  36. 36. Homogeneity Groupthink a psychological phenomenon that occurs within a group of people, in which the desire for harmony or conformity results in an incorrect decision-making outcome.
  37. 37. Homogeneity Groupthink Leads to loss of individual creativity, uniqueness and independent thinking. Produces an "illusion of invulnerability" and significantly overrates the the group’s abilities in decision-making, and significantly underrates the abilities of their opponents
  38. 38. Homogeneity Groupthink Pearl Harbor
  39. 39. Homogeneity Groupthink
  40. 40. Homogeneity Blinder effect
  41. 41. Homogeneity People tend to only hear the voices of people they agree with and create feedback loops reinforcing homogenity within a group Silo effect
  42. 42. Right Left
  43. 43. Technology Finance Marketing
  44. 44. Information cascade An information cascade occurs when people observe the actions of others and then make the same choice, independently of their own private informations.
  45. 45. Information cascade Conditions of occurence • • • • Decisions are made sequentially Decisions are made rationally based on the information available to each actor Each node do not have access to the information of other nodes Action space is limited (yes/no/like/...)
  46. 46. Information cascade Aggravating Factors • • • Low Weak link/Strong link ratio Homogeneity of information sources Homogeneity of position within network
  47. 47. Bandwagon effect People doing certain things because other people are doing it, regardless of their own beliefs, which they may ignore or override. The perceived "popularity" of something may have an effect on how it is viewed.
  48. 48. Bandwagon effect Buzz
  49. 49. Centralization
  50. 50. Division
  51. 51. herd instinct collective hysteria peer pressure Emotionality

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