Bulik C M, Brinded E C
Department of Psychology, University of Canterbury, Christchurch, New Zealand.
Physiol Behav. 1994 Apr;55(4):665-72. doi: 10.1016/0031-9384(94)90042-6.
The reinforcing value of both food and cigarettes was examined in female smokers with and without bulimia nervosa. Subjects underwent two food-deprivation (18 h) and two nondeprivation conditions and worked for either food vs. money or cigarettes vs. money on concurrent progressive variable ratio schedules. Schedules for food/cigarettes increased progressively while schedules for money remained the same. Results indicated no differences in the amount of time subjects spent working for food or the number of points earned for food in either bulimics or controls when examining the entire eight-game trial. Results of the initial two-game trial indicated marked differences, with the reinforcing value of food increasing after deprivation in control but not bulimic women and the total amount of time spent working for cigarettes increased after deprivation in controls. These results highlight that the effects of experimental food deprivation are most salient immediately after the deprivation and at low unit prices, and that bulimic and control women respond differently to a food-deprivation paradigm.
在患有和未患有神经性贪食症的女性吸烟者中，对食物和香烟的强化价值进行了研究。受试者经历了两次食物剥夺（18小时）和两次非剥夺条件，并在同时进行的渐进可变比率时间表上，为了食物与金钱或香烟与金钱而工作。食物/香烟的时间表逐渐增加，而金钱的时间表保持不变。结果表明，在检查整个八场试验时，无论是贪食症患者还是对照组，受试者为食物工作的时间量或为食物赚取的点数均无差异。最初两场试验的结果表明存在显著差异，对照组女性在食物剥夺后食物的强化价值增加，而贪食症女性则没有，并且对照组在食物剥夺后为香烟工作的总时间增加。这些结果突出表明，实验性食物剥夺的影响在剥夺后立即和低单价时最为显著，并且贪食症女性和对照女性对食物剥夺范式的反应不同。
