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Generalization, Discrimination, and Extinction01:24

Generalization, Discrimination, and Extinction

1.7K
Generalization, discrimination, and extinction are key concepts in operant conditioning that influence how behaviors are learned and maintained.
Generalization occurs when a behavior reinforced in one context is performed in similar situations. For instance, a student who studies diligently for calculus and receives excellent grades might apply the same study habits to psychology and history, expecting similar results. Generalization shows how learning in one setting can influence behavior in...
1.7K
Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

564
In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective. 
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant...
564
Reinforcement Schedules01:24

Reinforcement Schedules

653
Positive reinforcement is a powerful method for teaching new behaviors to both animals and humans. B.F. Skinner demonstrated this with his experiments using rats in a Skinner box. When a rat pressed a lever, it received a food pellet. This immediate reward encouraged the rat to repeat the behavior. This method, where a reward follows every instance of the behavior, is known as continuous reinforcement. It is highly effective for establishing new behaviors quickly.
Once a behavior is learned,...
653
Principles of Classical Conditioning01:23

Principles of Classical Conditioning

2.9K
Classical conditioning, as described by Ivan Pavlov, is a foundational concept in associative learning, where a neutral stimulus becomes capable of eliciting a conditioned response through association with an unconditioned stimulus. The process of acquisition, where this learning occurs, and the subsequent phenomena of contiguity, contingency, generalization, discrimination, extinction, and spontaneous recovery are crucial for a comprehensive understanding of classical conditioning.
During the...
2.9K
Law of Effect01:06

Law of Effect

5.0K
B.F. Skinner, a prominent figure in behavioral psychology, introduced operant conditioning by emphasizing the role of consequences in shaping behavior. This theory builds upon the law of effect proposed by Edward Thorndike, which posits that behaviors followed by satisfying outcomes are likely to be repeated. In contrast, those followed by unsatisfying outcomes are less likely to recur.
Edward Thorndike's foundational work involved studying learning in animals, particularly using puzzle...
5.0K
Associative Learning01:27

Associative Learning

1.7K
Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
1.7K

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相关实验视频

Updated: Mar 11, 2026

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
11:17

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear

Published on: August 24, 2012

36.3K

部分增强灭绝效应:学习试验序列或增强时间.

Mirari V B Wilcher1, Justin A Harris1

  • 1School of Psychology, University of Sydney.

Journal of experimental psychology. Animal learning and cognition
|March 9, 2026
PubMed
概括

当动物能够预测强化时,部分强化灭绝效应 (PREE) 减少. 这项研究发现,老鼠使用时间,而不是序列,来预测奖励,挑战现有的理论,并建议不确定性驱动PREE.

科学领域:

  • 行为心理学 行为心理学
  • 动物的学习和行为.
  • 认知神经科学是一种认知神经科学.

背景情况:

  • 部分强化灭绝效应 (PREE) 描述了部分强化后与连续强化相比,学习行为的消失速度较慢.
  • 序列理论认为,动物在部分增强下学习非增强的预测序列,在灭绝期间促进持久性.
  • 以前的研究表明,动物可以根据试验序列预测强化,从而可能减少PREE.

研究的目的:

  • 为了研究老鼠是否根据时间间隔或试验序列在部分强化下预测强化.
  • 挑战序列理论的核心假设,关于PREE的基础机制.
  • 检查加强可预测性在调节PREE中的作用.

主要方法:

  • 四组老鼠被训练使用连续和部分强化计划.
  • 强化学习的时间和序列在各组中被系统地操纵.
  • 随后的灭绝阶段评估了响应的持续性.

主要成果:

  • 鼠使用时间间隔,而不是序列,来预测在部分强化条件下的强化.
  • 基于时间线索预测强化的能力,在相关组中消除了PREE.
  • 仅在无法预测强化组中观察到PREE.

更多相关视频

Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats
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Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats

Published on: February 23, 2015

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A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats
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A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats

Published on: January 6, 2011

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相关实验视频

Last Updated: Mar 11, 2026

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
11:17

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear

Published on: August 24, 2012

36.3K
Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats
09:07

Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats

Published on: February 23, 2015

14.1K
A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats
08:54

A Procedure for Studying the Footshock-Induced Reinstatement of Cocaine Seeking in Laboratory Rats

Published on: January 6, 2011

21.8K

结论:

  • 这些发现挑战了序列理论,证明时间线索,而不是序列,驱动了强化预测.
  • 该PREE似乎取决于关于加强可用性的不确定性.
  • 关于强化增加的确定性通过使非强化更具信息性来增强灭绝学习.