Nagy Z M
Dev Psychobiol. 1976 Jul;9(4):389-99. doi: 10.1002/dev.420090412.
Separate groups of 9-day-old Swiss-Webster mice began straight-alley escape training at .1 or .4 mA. After 12 trials, half of the mice in each group were shifted to .4 or .1 mA, respectively, whereas the remaining half continued at their original level for an additional 12 trials. Twenty-four hours later, half of each of the 4 shock-level groups were retested at .1 mA, half at .4 mA. The results indicated that those groups which made a large number of competing responses during early trials and showed a gradual reduction over training trials (.1-.1 and .1-.4) emitted the fewest number during retest at either shock level. In contrast, those groups with either limited (.4-.1) or no (.4-.4) opportunity to decrease competing responses during training showed evidence of poor (.4-.1) and no (.4-.4) retention of learned inhibition of that response. Running speed was clearly a performance measure, as it only reflected existing shock levels during both training and retention trials.
将9天大的瑞士韦伯斯特小鼠分成不同组，分别以0.1毫安或0.4毫安开始直道逃避训练。经过12次试验后，每组中的一半小鼠分别转移到0.4毫安或0.1毫安，而其余一半则在其原始水平继续进行另外12次试验。24小时后，4个电击水平组中的每组一半在0.1毫安下重新测试，另一半在0.4毫安下重新测试。结果表明，那些在早期试验中做出大量竞争性反应并在训练试验（0.1 - 0.1和0.1 - 0.4）中逐渐减少的组，在任一电击水平的重新测试中发出的反应最少。相比之下，那些在训练期间减少竞争性反应的机会有限（0.4 - 0.1）或没有（0.4 - 0.4）的组，显示出对该反应的学习抑制表现较差（0.4 - 0.1）且没有保留（0.4 - 0.4）。奔跑速度显然是一种表现指标，因为它仅反映了训练和保留试验期间现有的电击水平。
