three-way interaction was again significant (num df = 1.93, ATS = 7.37, p = 0.001). While differences were not observable by impulsivity level or dose condition at the +10 timepoint, the increase in stimulation between the +10 and +30 timepoints was significantly greater at higher impulsivity levels. Further, this change was most pronounced during high-dose ethanol administration (Figure 1). In a model to assess change between the +30 and +60 timepoints, the dose by impulsivity interaction was significant (num df = 1.92, ATS = 8.05, p < 0.001), but the three-way interaction was not (num df = 1.92, ATS = 0.30, p = 0.73). Again, the more impulsive participants were, the stronger their stimulant response, particularly in the high ethanol condition. However, this relationship applied the same way across the +30 and +60 timepoints, thus the lack of a significant three-way interaction.
