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The Design of Everyday Things

The Design of Everyday Things

by Don Norman

Types of Errors in Design

There are 2 types of errors:

  • slips (a person intends to do an action and ends up doing something else). Can be: action-based(correct action applied to the wrong object), mem...

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The 3 Levels of Processing that inform the 3 Stages of Action

There are 3 levels of processing that inform the action a user does:

  • visceral (lowest level, correlated with calm and anxiety). Actions: perform and perceive.
  • behavioural (middle level, correlated with expectations and emotions). Actions: speci...

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Affordances - the relationship between the properties of an object and the capabilities of an agent

Signifiers - an indicator that communicates appropriate behaviour to a person

Constra...

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  • Incremental - Continuous Testing and Refinement. Starts from an existing product. Called also Hill Climbing (move your foot in one direction - if it is uphill, take one step. If not, change direction. Do that until the top of the peak). Con: cannot find a higher hil...

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jean baptiste alphonse karr

The more things change, the more they are the same.

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