Figure 4.

Psychometric functions for 3 ternary mixtures: Acetic, butyric, and hexanoic acids (left); acetic, butyric, and octanoic acids (middle); and acetic acid, butyric acid, and ML (right). y axis: log-odds ratio of chance-corrected pcorr; x axis: concentration step (2.2-fold dilutions, where the proportions of the 3 compounds in each mixture remain the same as concentration increases). Filled symbols (solid lines) represent observed detection data. Open symbols (dashed lines) represent additivity predictions based on detection functions for individual components under an assumption of probability summation. Error bars represent ± standard error of the mean.