The relative-reinforcing value of food under differing levels of food deprivation and restriction
The relative-reinforcing value of food under differing levels of food deprivation and restriction
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DOI：
10.1016/s0195-6663(02)00161-7
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发表时间：
2003-02-01
期刊：
影响因子：
5.4
通讯作者：
Epstein, LH
中科院分区：
文献类型：
--
作者：
Raynor, HA;Epstein, LH
食物匮乏和限制都会增加食物消费。食物匮乏也会增加食物的强化价值，但尚不清楚单独的食物限制或与食物匮乏结合是否会增加食物的强化价值。四十名正常体重、大学年龄、不受限制的女性被随机分配到四种跨越食物剥夺 (Dep) 和限制 (Res) 的条件之一：Dep/Res、Dep/No Res、No Dep/Res、No Dep/No Res。所有参与者到达时至少有 13 小时禁食，未禁食的参与者在会议期间从饮料中消耗了至少 365 卡热量。通过在参与者面前放置零食，在会议期间 15 分钟内禁止进入，或者在参与者面前不放置零食来操纵限制。在实验操作之后，参与者完成了一项计算机选择任务，以确定食物的强化价值。重复测量方差分析发现，剥夺（p < 0.05）和试验（p < 0.001）对获得的食物积分有显着的主效应。贫困的参与者发现食物的强化作用更强，并且食物的强化价值随着时间的推移而下降。这表明，虽然短期食物匮乏会增加食物的相对强化价值，但短期食物限制对不受限制的饮食者的食物相对强化价值没有影响。 (C) 2003 Elsevier Science Ltd. 保留所有权利。
Food deprivation and restriction both increase food consumption. Food deprivation also increases the reinforcing value of food, but it is unknown if food restriction alone or combined with deprivation increases the reinforcing value of food. Forty, normal-weight, college-aged, unrestrained females were randomized to one of four conditions that crossed food deprivation (Dep) and restriction (Res): Dep/Res, Dep/No Res, No Dep/Res, No Dep/No Res. All participants arrived at least 13 h food-deprived, and non-deprived participants consumed at least 365 cal from a drink during the session. Restriction was manipulated by placing snack food in front of participants, without access for 15 min during the session, or having no snack food placed in front of participants. Following the experimental manipulations, participants completed a computer choice task to determine the reinforcing value of food. Repeated measures analysis of variance found a significant main effect of deprivation (p < 0.05) and trials (p < 0.001) for food points earned. Deprived participants found food to be more reinforcing, and the reinforcing value of food decreased over time. This suggests that while short-term food deprivation increases the relative-reinforcing value of food, short-term food restriction has no effect on the relative-reinforcing value of food in unrestrained eaters. (C) 2003 Elsevier Science Ltd. All rights reserved.