Automation and mechanization of work make people put the machine into operation and watch the state of operations. In the process of those works, they are apt to have accidents caused by their carelessness. To reduce such accidents, we can practise TOUCH and CALL, which is to indicate and ascertain the dangerous parts at every process before performing works. The objectives of this study are to show quantitatively the efficiency of TOUCH & CALL and to examine the effects of S-R compatibility. The results show that reaction time is longer(0.138-0.279sec.) in case of indicating with fingers and shouting than that of responding only visually. On the other hand, the error rate decreases by 3. 3 times -7times. From this, it is considered to verify quantitative estimation on multiple feedback of TOUCH & CALL.