Bakner L, Strohen K, Nordeen M, Riccio D C
Department of Psychology, Kent State University, OH 44242.
Physiol Behav. 1991 Dec;50(6):1269-72. doi: 10.1016/0031-9384(91)90595-f.
Two experiments were conducted examining the effects of flavor (CS) preexposure on the retention of conditioned taste aversion. In Experiment 1, rats received preexposure to sucrose solution followed by a sucrose-illness pairing. The expected "latent inhibition" effect was obtained when testing occurred after a two-day but not an eleven-day training-to-test interval. Experiment 2 extended these results by employing five- and twenty-one-day training-to-test interval parameters and provided evidence that the stronger taste aversion displayed by preexposed subjects following long retention intervals is not attributable to differences in training consumption of sucrose solution. This posttraining increase in conditioned taste aversion (CTA) suggests that preexposure blocks expression of memory.
进行了两项实验，研究味道（条件刺激）预暴露对条件性味觉厌恶记忆保持的影响。在实验1中，大鼠先接触蔗糖溶液，然后将蔗糖与疾病配对。当在两天而非十一天的训练至测试间隔后进行测试时，获得了预期的“潜伏抑制”效应。实验2通过采用五天和二十一天的训练至测试间隔参数扩展了这些结果，并提供证据表明，经过长时间记忆保持间隔后，预暴露的受试者表现出的更强味觉厌恶并非归因于蔗糖溶液训练摄入量的差异。这种训练后条件性味觉厌恶（CTA）的增加表明，预暴露会阻碍记忆的表达。
