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← Signifiers or Affordances - Intro to the Design of Everyday Things

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Showing Revision 2 created 05/25/2016 by Udacity Robot.

  1. That was a trick question. We wanted to
  2. emphasize that affordances and signifiers are quite different
  3. concepts. They're independent. Affordances are the possible actions
  4. an actor can take upon an item in question.
  5. Signifiers are the signal. Signal conveyed to the
  6. person about the possible actions. Something can be
  7. in affordance or a signifier or both or
  8. neither. It could even be a signifier of something
  9. but not afford doing it. The correct
  10. answers to the questions therefore are, the barbed
  11. wire. Yeah, the barbs on the barbed wire,
  12. they're both signifiers and anti-affordances. The danger sign,
  13. yeah, that's a signifier. The site of the
  14. high voltage line? Well, that's a signifier to
  15. some people, but meaningless to others. And a
  16. very high voltage itself is an invisible affordance.
  17. It doesn't afford getting near. You'll kill yourself,
  18. because within, but for a high voltage, if
  19. you're within one meter about three feet, it
  20. can be fatal. But there's nothing to see. It's
  21. invisible, so the very high voltage is actually
  22. at invisible anti-affordance. The doorknob. It's a partial
  23. signifier and an affordance. The signifier is only
  24. partial because it indicates where to do the action,
  25. you know, pushing, or pulling, or turning, but not which action to do.