Previous experiments using tentacle lowering conditioning in terrestrial snails Cornu aspersum have shown extinction and recovery of the conditioned response (CR) as a consequence of both inserting a delay between the extinction and test (spontaneous recovery) and of re-exposing the animal to the unconditioned stimulus after extinction (reinstatement). Two experiments that examined recovery of the CR due to a change in context (renewal effect) were carried out to continue this line of research. In Experiment 1, subjects received conditioning with an odour (CS) followed by extinction in the presence of another odour (CS + C), before being exposed to the original one (CS). In Experiment 2, conditioning and extinction of an odour CS took place in the presence of different circadian contextual cues (hour of the day and presence of light). The results showed that a return to the original context of conditioned training, after the extinction in a different context, either defined by an odour (Experiment 1) or by circadian cues (Experiment 2), produce a recovery of the CR compared to suitable control groups. These results can be interpreted as an instance of ABA renewal effect and they provide information about psychological mechanisms involved in extinction processes.

中文翻译：

---

通过昼夜节律背景线索更新蜗牛 Cornu aspersum 的条件触手降低

先前在陆生蜗牛 Cornu aspersum 中使用触手降低调节的实验表明，由于在灭绝和测试（自发恢复）之间插入延迟以及将动物重新暴露于无条件的环境中，条件反应 (CR) 的灭绝和恢复灭绝后的刺激（恢复）。进行了两项检查由于环境变化（更新效应）导致的 CR 恢复的实验，以继续这一研究线。在实验 1 中，受试者接受一种气味 (CS) 的调节，然后在另一种气味 (CS + C) 存在下消失，然后再接触原始气味 (CS)。在实验 2 中，气味 CS 的调节和消失发生在存在不同昼夜节律背景线索（一天中的小时和光的存在）的情况下。结果表明，在不同的环境中灭绝后，返回到条件训练的原始环境，无论是由气味（实验 1）还是由昼夜节律线索（实验 2）定义，与合适的对照相比，CR 会恢复组。这些结果可以解释为 ABA 更新效应的一个实例，它们提供了有关灭绝过程中涉及的心理机制的信息。