Results revealed a significant effect of sensation seeking (β = 0.23, t = 2.79, p = 0.006, r p = 0.23), a marginally significant effect of condition (β = 0.16, t = 1.96, p = 0.05, r p = 0.17), and a significant Condition × Sensation Seeking interaction (β = 0.17, t = 2.04, p = 0.04, r p = 0.17), depicted in Figure 1 .
A similar regression predicting intention to drink coffee revealed a marginal trend for the main effect of condition (β = -0.16, t = -1.91, p = 0.06, r p = -0.16) with participants in the experimental condition reporting less desire for coffee, no significant effect of sensation seeking (β = 0.02, t = 0.21, p = 0.83, r p = 0.02) and no significant interaction (β = -0.02, t = -0.22, p = 0.83, r p = -0.02).
Although the mean level difference in sensation seeking between the two groups did not reach statistical significance, t (138) = 1.59, p = 0.11, we tested whether our results would hold by matching participants in the two groups on their level of sensation seeking.