90-9-1 Theory

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Jacob Nielsen:

“The 90-9-1 theory explains the percentage of a wiki’s participation, breaking it down as readers being the highest percent, with minor contributors composing the 9 percent and enthusiastic and active contributors composing 1 percent of the total participants in a wiki.” (http://www.useit.com/alertbox/participation_inequality.html)

More Information

  1. Participation Inequality
  2. Wiki patterns article on the theory at http://www.wikipatterns.com/display/wikipatterns/90-9-1+Theory