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预测和激励价值操纵对标志和目标跟踪行为的影响
Cristina E María-Ríos1, Christopher J Fitzpatrick1, Francesca N Czesak1
1Neuroscience Graduate Program, University of Michigan, 204 Washtenaw Ave., Ann Arbor, MI 48109, USA.
Neurobiology of learning and memory
|June 29, 2023
概括
鼠表现出两种学习的行为:标志追踪 (以提示为重点) 和目标追踪 (以奖励为重点). 信号跟踪对奖励价值变化敏感,而目标跟踪对预测线索敏感,建议不同的学习规则.
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
背景情况:
- 有条件的接近反应可以表现为信号追踪 (提示导向) 或目标追踪 (奖励位置导向).
- 这些行为被认为是由于对有条件刺激的不同价值赋值引起的:信号跟踪的激励值和目标跟踪的预测值.
研究的目的:
- 调查信号跟踪和目标跟踪对激励和预测价值变化的不同灵敏度.
- 要确定这些不同的反应是否遵循不同的强化学习原则.
主要方法:
- 鼠被训练以表现出标志追踪或目标追踪行为.
- 使用化诱导了奖励值.
- 使用预先条件化的刺激进行了暗示屏蔽.
- 评估了在负面应急条件下的学习.
主要成果:
- 信号追踪行为对奖励值敏感,而目标追踪行为则不是.
- 目标追踪行为通过暗示屏蔽显著减少,与标志追踪不同.
- 标志跟踪和目标跟踪都被证实是帕夫洛夫式的反应,在负面偶然情况下可以学习.
结论:
- 信号跟踪和目标跟踪反应似乎由不同的强化学习机制控制.
- 当前的关联式学习模型可能需要修改,以适应标志和目标跟踪的差异性质.
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