Figure 2. Comparisons of tea-induced calmness between “No-stress day” and “Stress day” for stevia-sweetened tea (SVT), sucralose-sweetened tea (SCT), sugar-sweetened tea (SGT), and unsweetened tea (UST).

Tea-induced calmness is calculated as the difference between calmness ratings after and before drinking tea sample. A Wilcoxon Signed-Rank test was used for data analysis. N.S. represents no significant difference at P < 0.05. *Represents a significant difference at P < 0.05. Error bars represent standard error of mean.