This article discusses omissions in work-related accidents. The authors present James Reason's concepts on task characteristics which can increase the chance of operator omission. These ideas were applied to three accidents in which worker omission was given as the "cause" and "proof" of victim's guilt. Analysis of these accidents as a stepwise sequence of activities shows at least four of Reason's omissions characteristics. The expression "cognitive trap" is used to describe their simultaneous presence, and these omissions are highlighted as an organizational aspect requiring consideration in accident-prevention strategies.
Occupational Accidents; Helping Behavior; First Aid