Figure 2.

Behavioural response: (a) Intensity of oral responses perceived by the thermal taster (TT) and thermal non‐taster (TnT) group. Secondary scale indicates labels on the gLMS: BD = barely detectable, W = weak, M = moderate, S = strong, VS = very strong. (b) Percentage of subject's preference by each group. (c) The discrimination ability of subjects to correctly identify the CO₂ level delivered during the fMRI scan session, with the d’ value of the TT and TnT group provided. Asterisks indicate a significant difference between groups at P < 0.05. Error bars show standard error. [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com.]