Figure 6

Weekly Ethanol Intake after Introduction of 18% Ethanol Solution, Weeks 7 and 8 following Introduction of Opportunity to Drink Alcoholic Beverage. The figure summarizes intakes during the first two weeks of presentation of 18% ethanol solution. The values are the means of the total intake during the four days of each week of the procedure (n = 10/group). The first day of the 18% beverage was 57 days after the single injection of EV. Notice that the group of placebos reduced their intakes during Week 2, but that EV-treated groups did not. Comparisons using t-tests of EV-treated groups compared to placebo group indicates that no group was statistically different than placebo controls (ps > 0.20). One subject of placebo controls drank more ethanol during Week 1 than it had previously and all other subjects. At week 2 of the figure, t-tests indicate that each group was reliably different from placebo controls, all ps < 0.04.