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According to Jakob Nielsen 5 users is enough: http://www.useit.com/alertbox/20000319.html http://www.useit.com/alertbox/20000319.html

• joubert 16y ago
  Ok, I can buy that. I wonder why he chose 7 then in this case.
  • deleted 16y ago
    [deleted]
  • crystalis 16y ago
    That's how many were walking through the hallway.