As per our previous paradigms and consistent with that of O’Malley (O’Malley et al., 2002), we chose to assess alcohol consumption in the context of an alternative reinforcer, so subjects was given a “bar-credit” of $16 to buy up to 8 mini-drinks ($2 each) or choose to receive any money not spent. Participants had access to one bag of potato chips (28.3 gram/bag) per tray to simulate a normal bar environment and water was also provided.
