Bernal-Gamboa Rodolfo, Callejas-Aguilera José E, Nieto Javier, Rosas Juan M
National Autonomous University of Mexico, Mexico City, Mexico.
J Exp Psychol Anim Behav Process. 2013 Jul;39(3):221-32. doi: 10.1037/a0032181. Epub 2013 Apr 29.
Two experiments explored whether forgetting of an association depended on previous extinction of a different association in rats. Experiment 1 found that when rats were conditioned and extinguished with flavor X, a subsequently acquired conditioned aversion to flavor Y was reduced by a 19-day retention interval, something that did not occur when X and the US were initially presented unpaired. Experiment 2 found that when rats received training and extinction in one of two tasks (conditioned aversion to sucrose in Experiment 2a, and running for water in a straight alley in Experiment 2b), subsequent learning of the alternative task was partially forgotten over the 19-day retention interval. These results are similar to those previously found when manipulating physical and conceptual contexts in rats and humans, respectively, and suggest that the passage of time may play a role similar to the one played by the change in physical or conceptual contexts on information retrieval.
两项实验探究了大鼠对一种关联的遗忘是否取决于之前对另一种不同关联的消退。实验1发现，当大鼠对味道X进行条件化训练并消退后，随后习得的对味道Y的条件性厌恶在19天的保持间隔后会减弱，而当味道X和厌恶刺激最初未配对呈现时，这种情况并未发生。实验2发现，当大鼠在两项任务之一（实验2a中对蔗糖的条件性厌恶，以及实验2b中在直道上跑向水源）接受训练和消退后，在19天的保持间隔内，对另一项任务的后续学习会部分遗忘。这些结果与之前分别在大鼠和人类中操纵物理和概念背景时所发现的结果相似，表明时间的流逝可能在信息检索中发挥与物理或概念背景变化类似的作用。
