3.2. Stress hormones
As indicated in Table 2, Yakson group infants showed asignificant decrease in stress hormones compared to the control group infants (hypothesis 1). GHT group infants also showed significantly lower levels of stress hormones than control group infants (hypothesis 2). Contrary to the hypothesis, however, there was no difference between Yakson and GHT group infants with regard to stress hormones (hypothesis 3). For a more intuitive illustration of the cortisol measurement results, a plot has been depicted in Fig. 1. From the graph, it is clear that almost all the plot points for the control group are distributed above zero, which means that most of the subjects showed an increased cortisol value when no intervention had been applied. However, the plot points for the GHT and Yakson groups are mostly distributed below
zero, which means that most of the subjects showed a decreased cortisol value when GHT or Yakson intervention had been applied.
A graph illustrating the norepinephrine measurement results is depicted in Fig. 2. Once again, the plot points for the control group are mostly distributed above zero, which means that most of the subjects exhibited an increased norepinephrine value when no intervention had beenapplied. However, the plot points for the GHT and Yakson groups are evenly distributed below and above zero.