Monday, May 9, 2011

System Usability Scale

John Brooke came out with this "quick and dirty" usability test for real life application in his work place and it has been hugely successful since. I will use the usability scale on my Enthuasastep prototype for the smart phone.

Scoring SUS

  • For odd items: subtract one from the user response.
  • For even-numbered items: subtract the user responses from 5
  • This scales all values from 0 to 4 (with four being the most positive response).
  • Add up the converted responses for each user and multiply that total by 2.5. This converts the range of possible values from 0 to 100 instead of from 0 to 40.

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