Chao E T
Neurosci Biobehav Rev. 1984 Summer;8(2):225-9. doi: 10.1016/0149-7634(84)90045-9.
An experiment is reported with 5 beagles in which the concurrent operants procedure was used to scale glucose and fructose against a "standard" sugar, sucrose. The sugars were in solution and the dogs were required to lever-press to obtain access to the solutions. In the first part of the experiment, the dogs chose between fructose and sucrose, and between glucose and sucrose, in a series of tests where different volumes of the two sugars were available for pressing the two levers. This arrangement made it possible to construct an empirical function for each pair of sugars showing the relation between relative strength of responding on the levers and the relative volumes of fluids obtained. From these functions it was possible to predict the ratio of fluid-volumes that would render hedonic equivalence. The data supported the prediction, indicating the ability of the concurrent schedules procedure to scale qualitatively different food-items in dogs.
报告了一项用5只比格犬进行的实验，其中采用并发操作程序，以“标准”糖蔗糖为对照来衡量葡萄糖和果糖。糖呈溶液状态，狗需要按压杠杆才能获取溶液。在实验的第一部分，在一系列测试中，狗在果糖和蔗糖之间，以及葡萄糖和蔗糖之间进行选择，在这些测试中，不同体积的两种糖可供按压两个杠杆。这种安排使得能够为每对糖构建一个经验函数，显示杠杆上反应的相对强度与所获得液体的相对体积之间的关系。从这些函数中可以预测出能产生享乐等效的液体体积比。数据支持了这一预测，表明并发程序法有能力对狗的性质不同的食物进行衡量。
