试验间隔对雌性大鼠的标志跟踪和条件强化效力的影响。
Effects of inter-trial interval on sign-tracking and conditioned reinforcer efficacy in female rats.
机构信息
Department of Psychology, Utah State University, USA.
College of Arts & Sciences, Western New England University, USA.
出版信息
Behav Processes. 2023 Aug;210:104911. doi: 10.1016/j.beproc.2023.104911. Epub 2023 Jul 3.
Previous nonhuman studies have reported that sign-tracking to a conditioned stimulus (CS) is increased when the intertrial interval (ITI) duration is increased. Separate studies indicate that individual differences in sign-tracking (vs. goal-tracking) at a fixed ITI (and CS duration) is predictive of the conditioned reinforcer efficacy of the CS. The present study evaluates, for the first time, if increasing the ITI increases rats' sign-tracking and the conditioned reinforcing efficacy of the CS. Forty-five female rats were randomly assigned to one of three groups that completed appetitive Pavlovian training with ITIs of 14, 24, or 96 s. Subsequently, they completed tests of conditioned reinforcement. Replicating previous findings, longer ITIs increased sign-tracking to a lever-CS and, extending the literature, conditioned reinforcer efficacy of that CS was highest at the longest ITI used during Pavlovian training. Implications for behavioral interventions using conditioned reinforcement are discussed.
先前的非人类研究报告称，当试验间间隔（ITI）延长时，对条件刺激（CS）的信号追踪会增加。单独的研究表明，在固定 ITI（和 CS 持续时间）下对信号追踪（与目标追踪）的个体差异可预测 CS 的条件强化效力。本研究首次评估了增加 ITI 是否会增加大鼠的信号追踪和 CS 的条件强化效力。45 只雌性大鼠被随机分配到三个组中的一个，这三个组完成了 ITI 为 14、24 或 96 秒的条件性奖励 Pavlovian 训练。随后，他们完成了条件性强化测试。与之前的发现一致，较长的 ITI 增加了对杠杆-CS 的信号追踪，并且，扩展了文献，在 Pavlovian 训练期间使用的最长 ITI 下，该 CS 的条件强化效力最高。讨论了使用条件强化进行行为干预的意义。
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