almost significantlyp = 0.058
To test whether these differences between rounds were significant, we did a post-hoc analysis using a Tukey HSD test, which mostly confirmed the differences visible from the plot: R1.1 and R1.2 are significantly different ( p = 0.006), R1.3 and R1.4 are significantly different ( p = 0.006), R1.5 and R2.1 are almost significantly different ( p = 0.058) but R1.4 and R2.1 are ( p = 0.003).