In a study in the NASA Ames Advanced Concepts Flight Simulator, crews were given contradictory fire warnings during preparation for takeoff. The study found that 75 per cent of the crews following the guidance of an automated system shut down the wrong engine, whereas when following a traditional paper checklist only 25 per cent did likewise, despite both having access to additional information that should have influenced their decision. The tapes of the simulations showed that those following the automated system made their decisions faster and with less discussion, suggesting that the
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