The Graphical modeling of the physiological and psychological effects of odors on the human body during a footbath

This research examined the effect of two different odors (Lemon and Hinoki) on the human body whilst the subjects took a footbath. The subjects were ten healthy college students (male). The experiment was divided into two periods. The first was the baseline period of 5 minutes during which the students merely remained seated. During the second period the students continued to remain seated but immersed their feet in a footbath for 11 minutes. At the same time the students were exposed to different odors. Lemon was used for the odor termed `pleasant' and Hinoki was used for the odor termed `Japanese bath'. The results of our experiments showed that the use of both lemon and Hinoki odors significantly increased body temperature (36 degree). Using Graphical modeling we found a correlation between the use of different odors and subjects' impressions of the heat of the water in the footbath. Use of both the pleasant and Japanese bath odors showed a notable effect on the subjects' physiological and psychological performance. Especially at 36 degree Hinoki odor has a lot of relationship to physiological parameter, at 40degree lemon odor has a lot of relationship to physiological parameter. Based on the results of this experiment, we designed a preliminary graphical model of the effects of the different odors on the human body.