Habituation and within-session changes in motivated responding for food in children
Habituation and within-session changes in motivated responding for food in children
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DOI：
10.1016/j.appet.2007.09.005
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发表时间：
2008-03-01
期刊：
影响因子：
5.4
通讯作者：
Epstein, Leonard H.
中科院分区：
文献类型：
--
作者：
Temple, Jennifer L.;Giacomelli, April M.;Epstein, Leonard H.
在成人和儿童中，已经可靠地证明了在治疗期间获取食物的工具性反应减少，这与习惯一致。这项研究检验了这样的假设：训练期间对食物的工具性反应的减少是由于习惯而不是饱足感。 38 名 8 至 12 岁的儿童执行一项基于计算机的操作任务，赚取积分以在 20 分钟内获得薯片，并在最后 6 分钟内获得巧克力糖。食物强化剂的份量（75 kcal vs 225 kcal）和食物消耗（消耗/不消耗）。两种份量条件之间的响应下降率没有差异。消费组和非消费组在前 20 分钟内均表现出反应减速，其中消费组的反应下降速度更快。当呈现新奇的食物时，所有条件下的参与者都恢复了反应。尽管饱足感可能会导致进食时对食物的积极反应减少，但习惯化为本研究中观察到的结果提供了更完整的解释。 (c) 2007 Elsevier Ltd. 保留所有权利。
Within-session decreases in instrumental responding to obtain food, consistent with habituation, have been reliably demonstrated in adults and children. This study tested the hypothesis that within-session decreases in instrumental responding for food are due to habituation rather than satiation. Thirty-eight 8-12-year-old children performed a computer-based operant task to earn points toward access to potato chips for 20 min, and for chocolate candies for the final 6 min of the session. Portion size of the food reinforcer (75 kcal vs 225 kcal) and food consumption (consumption/no consumption). There was no difference in the rate of response decrease between the two portion size conditions. Both the consumption and non-consumption groups showed response decelerations during the first 20 min, with responses in the consumption group decreasing at a faster rate. When the novel food was presented, participants in all conditions recovered responding. Although satiation may contribute to reductions in motivated responding for food when food is consumed, habituation provides a more complete explanation for the results observed in this study. (c) 2007 Elsevier Ltd. All rights reserved.