Poling A, Thompson T
Pharmacol Biochem Behav. 1977 Oct;7(4):393-9. doi: 10.1016/0091-3057(77)90236-2.
Two food-deprived rats responded under a concurrent fixed-ratio 12 (food) fixed-ratio 1 (8% ethanol) reinforcement schedule in which a tone occurred during every second or every fourth interpellet interval. When ethanol-maintained lever presses during the presence of the tone shifted the food schedule to one in which electric shock punishment occurred, ethanol-maintained responding consistently decreased. The decrease in the frequency of ethanol-maintained responding varied directly with shock voltage from 25 to 100 V, and occurred during intervals with the tone present and absent. These results indicate that ethanol intake may be attenuated by contingent changes in a concurrent food schedule.
两只处于食物剥夺状态的大鼠在同时呈现的固定比率12（食物）固定比率1（8%乙醇）强化程序下做出反应，在该程序中，每隔一个或每隔三个颗粒间隔就会出现一个音调。当在音调出现时，由乙醇维持的杠杆按压将食物程序转变为出现电击惩罚的程序时，由乙醇维持的反应持续减少。由乙醇维持的反应频率的降低与25至100伏的电击电压直接相关，并且在音调出现和不出现的间隔期间都会发生。这些结果表明，乙醇摄入量可能会因同时进行的食物程序中的偶然变化而减少。
