Meisch R A, Beardsley P
Psychopharmacologia. 1975 Jul 23;43(1):19-23. doi: 10.1007/BF00437609.
Water and ethanol solutions were concurrently made available on a continuous reinforcement schedule to 4 food-deprived male albino rats during daily 1-hr sessions in an operant conditioning chamber equipped with 2 levers and 2 liquid dippers. The number of ethanol reinforcements substantially exceeded the number of water reinforcements for each rat at each concentration studied (8, 16, and 32% w/v). Water reinforcements were low in number and did not vary with ethanol concentration. As the ethanol concentration was increased, the number of ethanol reinforcements obtained decreased, while the quantity consumed (mg/100 g of body weight/hr) increased. The highest rate of responding occurred at the beginning of the session.
在配备有2根杠杆和2个液体滴管的操作性条件反射箱中，每天1小时的实验时段内，以连续强化程序同时向4只食物剥夺的雄性白化大鼠提供水和乙醇溶液。在所研究的每种浓度（8%、16%和32%重量/体积）下，每只大鼠的乙醇强化次数显著超过水强化次数。水强化次数较少，且不随乙醇浓度变化。随着乙醇浓度的增加，获得的乙醇强化次数减少，而消耗量（毫克/100克体重/小时）增加。最高反应率出现在实验时段开始时。
