Figure 1.
Distributions of scores in odor threshold test for Tsimane’ and European participants.
The scores in the test can range between 1 and 16 and they represent geometric series of concentrations of n-butanol (ranging from a 0.04 to 2.7877 × 10–9 n-butanol solution, dilution ratio 1:2).
Figure 2.
Quantile-Quantile (Q-Q) plot of odor thresholds for Tsimane’ and German participants. The solid line represents the general trend of the Q–Q plot.