FACTORS GOVERNING ONE-TRIAL CONTEXTUAL CONDITIONING
FACTORS GOVERNING ONE-TRIAL CONTEXTUAL CONDITIONING
复制标题
DOI：
10.3758/bf03205285
复制
发表时间：
1990-08-01
期刊：
影响因子：
--
通讯作者：
FANSELOW, MS
中科院分区：
文献类型：
--
作者：
FANSELOW, MS
当一只老鼠被放入一个房间中，不久之后受到一次足部电击，它在重新暴露于该房间时表现出有条件的冻结，但在不同的房间中则没有（实验1）。实验 2-4 表明，这种冻结的可能性随着放置在腔室中和电击传递之间的延迟的减少而线性减少。由于延迟非常短（例如，少于 27 秒），因此不会出现冻结现象。实验 2 和 3 表明，在进行电击前 24 小时，在冷冻室中预暴露 2 分钟，可减少成功条件冷冻所需的最短延迟。实验 4 表明，如果显着音调是上下文刺激的组成部分，则较短的延迟可以成功调节冻结。由延迟间隔和预暴露引起的冻结的变化并不仅仅反映了上下文中的总时间，这表明可能有两个要求对冻结反应的调节施加了时间限制。人们对充分的暴露感到满意，无论这种暴露是否与震惊相邻。第二个要求是与震惊相关的少量环境暴露。
When a rat was placed in a chamber and shortly thereafter received a single footshock, it showed conditional freezing upon re-exposure to that chamber but not a different one (Experiment 1). Experiments 2-4 showed that the probability of this freezing decreased linearly with decreases in the delay between placement in the chamber and shock delivery. With very short delays (e.g., less than 27 sec), there was no freezing. Experiments 2 and 3 demonstrated that a 2-min pre-exposure to the chamber, 24 h prior to shock delivery, reduced the minimum delay necessary to successfully condition freezing. Experiment 4 demonstrated that shorter delays were successful conditioning freezing if a salient tone was a component of the contextual stimulus. The changes in freezing caused by delay interval and preexposure did not simply reflect the total time in the context, suggesting that there may be two requirements that place temporal restrictions on the conditioning of the freezing response. One is satisfied by sufficient exposure, whether or not that exposure is contiguous with shock. The second requirement is for a small amount of context exposure that is contiguous with shock.