An apparatus for the study of the human operator

THE QUANTITATIVE UNDERSTANDING of the behavior of a human being functioning as an element of a closed-loop control system has become a matter of considerable importance in recent years. In addition to the purely military problems of high-speed flight, fire control, and similar tasks, there are many situations where a specific knowledge of human characteristics would make possible improvements in design and performance of the over-all system. The rapid development of the theory and practice of feedback control systems has given new impetus and interest to the study of the nature of human behavior in analogous situations.