Why does the website limit my choice to one pairwise comparison at a time?
When the credible interval for a difference does not include 0, there is a statistical risk that there is in fact not a true difference. As the number of comparisons conducted increases, so does the risk that a false conclusion of a significant difference is made for one or more of the differences being compared. To focus users on specific comparisons, the pairwise comparison tool is constructed to allow only one comparison at a time.