HUMAN ERROR Flashcards
Putting the milk away in the cupboard instead of in the fridge
You decide not to bring your umbrella to work on a day that ends up having rain
Small Errors
Talking on your cell phone distracts you from the road and you hit and kill a pedestrian
- USS Vincennes
Big Errors
In Error Taxonomy, What is a “SLIP”?
failure in execution of action
Intended behavior is appropriate, but is not carried out correctly, i.e. the user has the right intention but does the wrong thing
E.g. grabbing the wrong bottle of medication, hitting “save” function instead of “save as,” typing your password into the user name box on a login screen
When are slips especially likely to occur?
when a familiar or automatic behavior must be inhibited
E.g. writing the wrong year on a check, putting car into drive when it should be in reverse
What is a Mistake?
errors in planning of action
Intended behavior is inappropriate under the circumstances
A person makes a poor decision, misclassifies a situation, or fails to take all the relevant factors into account
E.g. deciding to let a flight take off despite knowledge of potentially dangerous weather
Lapses
an intended action is forgotten and not carried out
The result of memory failures such as losing track of your place in a sequence of actions
E.g. failing to attach files in an email
Violations
: intentional choice to disobey rule or procedure (without the intention to cause harm)
Can occur because of organizational emphasis on costs or productivity instead of safety
E.g. not wearing hearing protection on construction sites
Mode Errors
action is appropriate in one system mode, but is carried out in a different mode
Failing to put car back into drive after backing up a little bit
Typing in Overwrite mode instead of Insert mode
Failing to put remote control into mode appropriate for device (TV, VCR, stereo…)
the user fails to perform the required action
Error of Omission
the user performs an inappropriate action
Error of Commission
What other types of error are there? (3)
Timing Error: Performs an action too early/late
Sequence Error: Performs the steps in the wrong order
Selection Error: Uses the wrong control
What are 3 errors classified by their location in the human information processing system?
Input Error
Mediation Error
Output Error
What is information from the sensory and perceptual processes?
Input error
What is mediation error?
cognitive processes that translate between perception and action
What is output error?
Due to the selection and execution of physical responses.
