Araiba Sho, El Massioui Nicole, Brown Bruce L, Doyère Valérie
Graduate Center of the City University of New York, New York, New York 10016, USA.
Institut des Neurosciences Paris-Saclay (Neuro-PSI), UMR 9197, Université Paris Sud, CNRS, Université Paris Saclay, Orsay 91405, France.
Learn Mem. 2018 Nov 15;25(12):629-633. doi: 10.1101/lm.047878.118. Print 2018 Dec.
This study demonstrates that overtraining in temporal discrimination modifies temporal stimulus control in a bisection task and produces habitual responding, as evidenced through insensitivity to food devaluation. Rats were trained or overtrained in a 2- versus 8-sec temporal discrimination task, with each duration associated with a lever (left or right) and food (grain or sucrose). Overtraining produced a leftward shift in the bisection point. Devaluation treatment induced a differential loss of responding depending on stimulus duration (short versus long) and the level of training (training versus overtraining). The relationships between timing behavior and habitual behavior are discussed.
本研究表明，时间辨别任务中的过度训练会改变二分任务中的时间刺激控制，并产生习惯性反应，这一点可通过对食物贬值不敏感得到证明。大鼠在2秒对8秒的时间辨别任务中接受训练或过度训练，每个时长与一个杠杆（左或右）及食物（谷物或蔗糖）相关联。过度训练使二分点向左偏移。贬值处理根据刺激时长（短与长）和训练水平（训练与过度训练）导致反应的差异性丧失。本文讨论了时间行为与习惯性行为之间的关系。
