Within- and between-session variety effects in a food-seeking habituation paradigm.
Within- and between-session variety effects in a food-seeking habituation paradigm.
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DOI：
10.1016/j.appet.2013.01.025
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发表时间：
2013-07
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：
Bouton, Mark E.;Todd, Travis P.;Miles, Olivia W.;Leon, Samuel P.;Epstein, Leonard H.
当生物体被给予各种食物时，其食欲行为比重复给予相同食物时更强（多样性效应）。两个实验考察了操作性食物搜寻任务中的多样性效应。在这两个实验中，大鼠接受45毫克的食物颗粒，每4个杠杆压力超过一系列的每日30分钟的会议。大鼠在会话早期的反应率很高，但在会话期间随着时间的推移，反应率系统地下降。在实验1中，谷物和蔗糖颗粒之间的不可预测的交替引起了更高水平的响应，和一个较慢的会话内下降的响应，比呈现任何类型的颗粒一致。在持续接受一种颗粒的组中，切换到另一种颗粒会引起反应率的合法变化，这反映了习惯化和激励对比过程。在实验2中，实验组每天交替接受谷物和蔗糖。在蔗糖阶段，他们的反应比总是接受蔗糖或谷物（一种品种效应）的对照组更多;在谷物阶段，他们的反应比对照组少。结果表明，在会话内的品种效应，控制的习惯化过程和会话之间的品种效应，控制的激励对比。当生物体暴露于各种食物时，这两种过程都可以发挥作用。
Appetitive behavior is stronger when organisms are given a variety of foods than when they are repeatedly given the same food (the variety effect). Two experiments examined the variety effect in an operant food-seeking task. In both experiments, rats received a 45-mg food pellet for every 4th lever press over a series of daily 30-min sessions. The rats responded at a high rate early in the session, but the rate declined systematically over time within the session. In Experiment 1, alternating unpredictably between grain and sucrose pellets caused a higher level of responding, and a slower within-session decline in responding, than presenting either type of pellet consistently. In groups receiving one pellet consistently, a switch to the alternate pellet caused lawful changes in response rate that reflected both habituation and incentive contrast processes. In Experiment 2, an experimental group received grain only and sucrose only in daily alternating sessions. In sucrose sessions, they responded more than controls that always received either sucrose or grain (a type of variety effect); in grain sessions, they responded less than the controls. The results indicated a within-session variety effect that was controlled by habituation processes and a between-session variety effect that was controlled by incentive contrast. Both types of processes can come into play when organisms are exposed to food variety.
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影响因子：
7.1
作者：
Epstein, Leonard H.;Carr, Katelyn A.;Fletcher, Kelly D.
通讯作者：
Fletcher, Kelly D.
DOI：
10.3758/bf03192817
发表时间：
2001-02-01
期刊：
ANIMAL LEARNING & BEHAVIOR
影响因子：
--
作者：
Aoyama, K;McSweeney, FK
通讯作者：
McSweeney, FK
影响因子：
1.4
作者：
Winterbauer, Neil E.;Lucke, Sara;Bouton, Mark E.
通讯作者：
Bouton, Mark E.
影响因子：
1.4
作者：
Melville, CL;Rue, HC;Weatherly, JN
通讯作者：
Weatherly, JN
影响因子：
5.4
作者：
Temple, Jennifer L.;Giacomelli, April M.;Epstein, Leonard H.
通讯作者：
Epstein, Leonard H.