A given job of work can be done by the human operator by a variety of different internal controls and adjustments which may never settle into a characteristic static pattern. To obtain a comprehensive measure of the man at any one time it is necessary to measure simultaneously psychological, biochemical, physiological and anatomatical parameters.
In: Measurement of man at work : an appraisal of physiological and psychological criteria in man-machine systems, proceedings of the Symposium held in Amsterdam by the International Ergonomics Association, September 1969, p. 17-25 ; Paper 1: 1-1969.
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