The reliability of the current study was enhanced
by the precision of the taste testing protocol. Great
care was taken in the measurement of the taste testing
compounds and diluent solutions. The taste testing
solutions were prepared by a single person using the
same method on every data collection day. A single
investigator poured each sample and administered
all taste tests. Samples were presented in random order
for the purpose of allocation concealment, which
prevented those enrolled from knowing the upcoming
taste testing assignment.