ErrorDetection - Necessary Condi*ons for Detec*ng...

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Unformatted text preview: 10/20/11 Necessary Condi*ons for Detec*ng Error Detec*ng Errors •  •  •  •  Access Knowledge or expecta*on AAen*on Perspec*ve a distributed cogni*ve process Access •  One must be able to sense the behavior that is in error. •  Affected by a person’s loca*on in the system (horizon of observa*on) and by what informa,on goes where, when, in what form. –  Open interac*ons –  Open tools Jobs in sea and anchor detail Knowledge •  One must have knowledge or expecta*on about the correct outcome. Error detec,on requires a comparison between two representa,ons of the same thing. •  What is the distribu*on of knowledge in the system? •  How is that distribu*on produced and maintained? Overlap of knowledge 1 10/20/11 AAen*on •  One must aAend to the sensed informa*on in terms of the knowledge or expecta*on. •  This may be affected by –  the nature of the tasks being done –  the flow of ac*vity –  arousal state –  compe*ng cogni*ve tasks Perspec*ve •  One’s place in the system or one’s job may make certain kinds of errors easier to detect. •  Monitoring and performing are different ac*vi*es with different perspec*ves. •  High workload can lead to increased error produc*on and decreased error detec*on Should we strive to Eliminate Error? •  Human systems always lose experts and acquire novices. •  Exper*se is maintained through learning. •  Detected errors are opportuni*es for learning while doing. •  A paradoxical property of human systems: some non ­zero amount of error may be adap*ve. 2 ...
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