Summary of data collected during the Forced-Choice Triangle test per round of data collection, and associations of study design, participant, and water quality variables with detection threshold.

P-values from statistical analysis (Kruskal–Wallis test) provide the degree of association between the detection threshold and the variable. The median detection threshold (range (minimum-maximum) and standard deviation) is provided when the association is significant (p≤0.05). (XLSX)