Chris Johnson, Index

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GEMS: Error Detection

• Dont try to eliminate errors:
  - but focus on their detection.
  
  
• Environmental error cueing:
  - block users progress;
  - help people discover error;
  - "gag" or prevent input;
  - allow input but warn them;
  - ignore erroneous input;
  - self correct;
  - force user to explain..
  
  
• Importance of other operators
  - help discover errors (next topic).

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