对跑步的预暴露减轻了老鼠以跑步为基础的味道避开:通过覆盖线索或上下文改变来测试关联性阻断
1Department of Psychological Science, Kwansei Gakuin University, Nishinomiya, Japan.
概括
在老鼠中,以跑步为基础的风味回避学习 (FAL) 通常因先前的轮子暴露而减弱. 这项研究挑战了关联性解释,发现上下文线索不能完全解释这种暴露前效应.
科学领域:
- 行为神经科学 行为神经科学
- 学习和记忆的学习和记忆
- 动物行为 动物行为
背景情况:
- 在老鼠中,自愿跑步诱导了对事先消费的味道的有条件的味道厌恶,这种现象被称为基于跑步的味道回避学习 (FAL).
- 之前重复接触跑轮会减少这种FAL效应.
- 协会性账户假设,事先建立的上下文运行协会通过使运行可预测,阻止风味调节.
研究的目的:
- 调查基于跑步的风味回避学习中预暴露效应的关联性解释.
- 确定在预暴露期间引入一个独特的提示是否可以破坏上下文运行的关联,并防止FAL.的减弱.
- 为了测试上下文阻断在先前轮子暴露后观察到的减少FAL中的作用.
主要方法:
- 在三个实验中,老鼠被暴露在运行的轮子中,具有不同的风味线索和上下文变化.
- 实验1和2在预暴露期间引入了二次风味提示,以评估其对背景运行的关联形成的影响.
- 实验3操纵了暴露前和FAL阶段之间的背景背景,以评估上下文阻断.
主要成果:
- 实验1通过在引入次要提示时显示未减弱的FAL来支持关联性帐户.
- 实验2与关联性解释相矛盾,因为暴露前效应即使在明显的风味线索下也持续存在.
- 实验3表明,改变背景环境并不能消除暴露前效应,进一步挑战关联性帐户.
结论:
- 预测FAL的上下文阻断的关联性帐户没有得到整体发现的支持.
- 在以跑步为基础的风味回避学习中,预暴露效应似乎比简单的上下文阻止解释的更复杂.
- 需要进一步的研究,以阐明在重复暴露后观察到的减少FAL背后的机制.
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