If the DD task is set up correctly, there should be a decrease in reward received with lower adjusted amounts, because a more impulsive strategy is self-defeating (Ainslie, 1975). Actual consumption of reward declined as a function of Delay F(3.4,202.9) = 31.17, p < 0.001, and showed interactions of Delay × Alcohol Preference F(3.4,202.9) = 5.09, p = 0.001, Delay × Experiment F(3.4,202.9) = 7.38, p < 0.001, but not interactions with Sex (ps > 0.12). There was a main effect of Experiment F(1,60) = 15.49, p < 0.001, but not of Sex (p = 0.25), Alcohol Preference (p = 0.12), or interactions with Alcohol Preference (ps > 0.13). Therefore, data were collapsed across Sex, and to follow up on the interactions with Alcohol Preference and Experiment, experiments were analyzed separately by Line. Experiment 1 showed main effects of Delay F(2.6,82.2) = 24.55, p < 0.001 and Line F(1,31) = 4.23, p = 0.048 as well as a Delay × Line interaction F(2.6,82.2) = 5.19, p = 0.004. To follow up on this interaction, we assessed whether there were line
