BEHAVIOUR IN CONTROLLING A COMBINATION OF SYSTEMS

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Abstract
The state of a manually controlled system or combination of systems depends upon a balance between the skill of the operator and the difficulty of his task. When the difficulty of the task is varied by increasing the number of systems which have to be controlled, some change in the pattern of performance can be expected. It is possible to identify the parameters of performance which can be adjusted to meet the increasing demands of such a situation, and to describe how they are related to each other and to overall performance. This analysis has boon applied to a task in which the pointers of Several dials which tend spontaneously to deviate have to be kept as nearly in alignment as possible, and an experiment with this task has shown ways in which subjects adapt to changes in the number of dials (and controls) involved.

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