Hoffmann H, Hunt P, Spear N E
Department of Psychology, Knox College, Galesburg, Illinois 61401.
Behav Neural Biol. 1990 May;53(3):441-50. doi: 10.1016/0163-1047(90)90324-y.
Using a double dissociation design with 15% sucrose solution and exposure to a heat lamp (34 degrees C) as CSs and 0.3 M LiCl and 1-mA footshock as USs, the present study found 15-day-old rats to show selective associations similar to those found in adults. Five-day-old pups, however, expressed similar sucrose aversions when this solution was paired with either LiCl or footshock, whereas they expressed heat aversions after heat-LiCl but not heat-shock pairings. Results are discussed with respect to previous data on selective associations in pups, current theories on selective associations, and ontogenetic differences in stimulus selection.
本研究采用双分离设计，以15%蔗糖溶液和暴露于热灯（34摄氏度）作为条件刺激（CSs），0.3M氯化锂和1毫安足部电击作为非条件刺激（USs），发现15日龄大鼠表现出与成年大鼠相似的选择性关联。然而，5日龄幼崽在该溶液与氯化锂或足部电击配对时表现出相似的蔗糖厌恶，而在热-氯化锂配对后表现出热厌恶，但在热-电击配对后未表现出热厌恶。结合先前关于幼崽选择性关联的数据、当前关于选择性关联的理论以及刺激选择中的个体发育差异对结果进行了讨论。
