A task difficulty—G stress experiment

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Abstract
Methods to design manual tracking tasks were studied and described. These tasks are to be used to help investigate performance changes as humans are subjected to G acceleration stress. The design of the tasks had to meet 2 criteria. First, the tasks were required to differ from each other in terms of subjective difficulty (as well as showing a performance change empirically). Secondly, each task had to be sensitive enough to show performance changes in a stress/non-stress environment. The tasks used were of a sum of sines design approach which occurs commonly in manual control theory. The type of environmental stress considered in this study was a + Gz acceleration to which aircraft pilots are exposed during flight maneuvers. The experiment was conducted on the Dynamic Environmental Simulator (D.E.S.), a 3 degree of freedom human centrifuge located at the Air Force Aerospace Medical Research Laboratory at Wright Patterson Air Force Base, Ohio [USA].

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