uAnother Cognitively
Based System - Slips vs. Mistakes by
Reason and Navon
lSlips
are errors in execution
lMistakes
are errors in planning an action
uLawrence’s (1974)
Model with Relative Frequency
lFailure
to perceive a hazard 36%
lUnderestimate
a hazard 25%
lFailure
to respond 17%
lIneffective
response 14
uImportance:
Different types of errors need different types
of actions to prevent.