Tested in a Group(2) × Odor(3) × Condition(2) linear mixed model covering all three odorant classes present during imaging, there was a Odor main effect for intensity (F= 4.60, p = 0.02), but without a Group main effect or a Group × Condition interaction. t-contrasts showed no significant differences in intensity between AO (7.52, SD= 0.95) and ApCO (7.25, SD= 1.12) or NApO (6.78, SD = 1.39), with the intensity difference being between the two control odorant classes (ApCO and NApO; p < 0.05). All stimulus classes were equally pleasant (AO= 7.07, SD= 1.46; NApO= 6.95, SD= 1.23; ApCO =7.22, SD= 1.14), without significant group or infusion interactions. With an Odor main effect for representativeness (F= 6.25, p = 0.007), planned comparisons showed that AO (7.92, SD= 1.01) was perceived as slightly but significantly more representative than ApCO (6.97, SD =1.45). However, and of importance to the group comparisons of imaging results, there were no other main effects or interactions between Group and Condition.
