Fig. 4.
Alcohol intake during a 60 min operant self-administration session in (DEPENDENT, n = 10) and (NONDEPENDENT, n = 11) rats measured 8 hr after removal of ethanol or control liquid diet. The amount of self-administered alcohol during the withdrawal test was significantly greater in dependent than in nondependent rats (*p < 0.05; significantly different from nondependent rats, Student’s t test).