DesignOfEverydayThings - Signifier - 7

• When facing a device, we seeking for clue about how to use. Designer need provide it.
  Otherwise, we need use our own creativity and imagination.
• Misleading signifier: a row of vertical pipes across a service road in a public park
• Pipes blocks cars
• Park vehicle go through the pipes
• Affordances: possible interactions between people and environment.
• Perceived affordance often acts as signifier, but they can be ambiguous
• Signifiers signal things, indicate what actions are possible and how to be done. Signifier must be visible.