Abstract
Increased mental workload is often associated with increased risk of pilots’ operational errors. Mental workload is a multifactor problem. The paper aims at defining an appropriate indicator for pilot mental workload, under the assumption that vision is the single most important source of information for the pilot. We design a series of experiments about the task difficulty, which have different visibility, taxiing length and turns. The results showed that the fixation frequency did not increase with the task difficulty. Fixation frequency is not sensitive with the mental workload. This study concludes that the Fixation frequency cannot be used as the evaluation criteria of mental workload. But the results may be caused by small sample sizes (three pilots).
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