By providing patients not only behavioral directions but also sensory 'information, changes of blood pressure and pulse rate were reduced and investigation time shortened in conducting upper gastrointestinal endoscopy. Prior formation of a subjective scheme for discomfort before undergoing examination provided preferable readiness in the patients by making them predict stimuli, thereby producing an appropriate level of tension. Coincidence of predicted sensory stimulus and actual experience also seems to reduce the impact of endoscopy. In conducting upper gastrointestinal endoscopy, presentation of sensory information together with behavioral directions reduces patients' emotional reactions, and was therefore shown to be a significant method of care for successful examination.