Del Grosso N, Spinozzi G, Robustelli F
Arch Fisiol. 1973 Dec;70(3-4):219-32.
Lengthening the time interval between the conditioned stimulus and the unconditioned stimulus increases the number of active avoidance conditioned responses in subjects that have been trained to a stable level of performance in many previous conditioning sessions. In the present research, rats chosen from a population specially selected for low rates of avoidance conditioning have been used. In addition to this characteristic, subjects were chosen for the exhibition of an apparent absence of retention from one day to another. The dependency of the number of conditioned responses on the time interval between conditioned stimulus and unconditioned stimulus may lead to wrong evaluation of the subjects' conditioning level. In fact, the level of conditioning may be attributed to either learning or memory processes when in many cases it is determined only by the latency time of the conditioned response. The conditioned response has no possibility of manifesting itself when its latency time exceeds in length the time interval between conditioned stimulus and unconditioned stimulus.
延长条件刺激与非条件刺激之间的时间间隔，会增加那些在之前多次条件反射训练中已达到稳定表现水平的受试者的主动回避条件反应数量。在本研究中，选用了从特意挑选出的回避条件反射率较低的种群中选取的大鼠。除了这一特征外，还挑选了那些表现出明显的一天到另一天之间无记忆留存的受试者。条件反应数量对条件刺激与非条件刺激之间时间间隔的依赖性，可能会导致对受试者条件反射水平的错误评估。事实上，在许多情况下，当条件反射水平仅由条件反应的潜伏期决定时，其可能归因于学习或记忆过程。当条件反应的潜伏期超过条件刺激与非条件刺激之间的时间间隔时，条件反应就没有表现出来的可能性。
