A. Number of 20% ethanol deliveries during 10-min intervals. The graph summarizes data collected and published in Carnicella et al., 2008 and Neasta et al., 2011; n = 15.
B. Correlations between BECs and the ethanol consumed by 20% ethanol IA2BC-trained rats during a 30-min operant 20% ethanol self-administration session (black, n = 12), or by rats pre-trained with a sucrose-fading 10% ethanol procedure, during a 1-h operant 10% ethanol self-administration session (gray, n = 10).