Abstract
The results of the author's study are related to the results of a series of experiments in the past 3 years to know the relationship between skill acquiring and psycho-physiological reactions under mental working conditions. The experiment was carried out in the laboratory by the tracking system equipment constructed with 2 beams occilloscope, hand tracking control box and polyrecorder, using 7 male university students aged from 20 to 21 over 7 days. The results of the experiment show the nearly same results as those of gained by the previous experiments. namely, the gradual acguiring of skills gained through an increasing number of practices are revealed in psycho-physiological reactions. The heart-rate, SD of heart-rate, respiration-rate, and galvanic skin reftex of the subjects show their highest level in their first practice and a gradual decrease to their final levels as practice proceeds. It becomes also clear that the spare mental capacities seem to be tightly connected with increase or decrease of both tracking and human performances.
