Molet Mikaël, Urcelay Gonzalo P, Miguez Gonzalo, Miller Ralph R
Department of Psychology, State University of New York (SUNY)-Binghamton, Binghamton, NY 13902-6000, USA.
J Exp Psychol Anim Behav Process. 2010 Jan;36(1):126-36. doi: 10.1037/a0016055.
Three conditioned lick suppression experiments with rats examined the role of the context in the selection and integration of independently acquired interval relationships. In Experiment 1, rats were exposed to separate conditioned stimuli 1 and 2 (CS1-CS2) pairings with 2 different interval relationships, each in its own distinctive context, X or Y. The resultant integration was determined by the training context (X or Y) in which unconditioned stimulus (US)-CS2 backward pairings occurred, as assessed in a third neutral context (Z). In Experiment 2, rats experienced CS1-CS2 pairings with 2 different interval relationships as in Experiment 1, and then received US-CS2 pairings in both contexts X and Y. The testing context (i.e., X or Y) determined the resultant integration. In Experiment 3, rats were exposed to CS1-CS2 pairings in 2 different interval relationships each in different phases (i.e., Phases 1 and 2), and then in Phase 3 received US-CS2 pairings. The temporal context of testing (i.e., short or long retention interval) determined the resultant integration. Thus, both physical and temporal context can be used to disambiguate conflicting temporal information.
三项针对大鼠的条件性舔舐抑制实验，研究了环境在独立习得的间隔关系的选择与整合中所起的作用。在实验1中，大鼠在两个不同的环境X或Y中，分别接触具有两种不同间隔关系的条件刺激1和条件刺激2（CS1-CS2）配对。通过在第三个中性环境（Z）中评估，由无条件刺激（US）-CS2逆向配对发生时的训练环境（X或Y）来决定最终的整合情况。在实验2中，大鼠像在实验1中一样经历具有两种不同间隔关系的CS1-CS2配对，然后在环境X和Y中都接受US-CS2配对。测试环境（即X或Y）决定了最终的整合情况。在实验3中，大鼠在不同阶段（即阶段1和阶段2）分别接触具有两种不同间隔关系的CS1-CS2配对，然后在阶段3接受US-CS2配对。测试的时间环境（即短或长的保持间隔）决定了最终的整合情况。因此，物理环境和时间环境都可用于消除相互冲突的时间信息的歧义。
