奖励的积极性对加强值不敏感
Lindsay S Shaffer1,2, Holly D Crowder3, Peter A Kakalec3
1Department of Psychology, George Mason University, Fairfax, VA, USA. lindsay.s.shaffer@gmail.com.
Cognitive, affective & behavioral neuroscience
|June 5, 2025
概括
当食物奖励值因腹而下降时,奖励积极性 (RewP) 脑信号不会改变. 这表明RewP对影响基于奖励的决策的动机状态变化不敏感.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 决策 决策 决策 决策
背景情况:
- 行为适应依赖于评估与当前动机状态相对的奖励结果.
- 奖励积极性 (RewP) 是一种与奖励价值和动机相关的脑电图 (EEG) 信号.
- 目前尚不清楚RewP是否反映了由动机状态转移影响的奖励价值的变化.
研究的目的:
- 调查RewP信号的变化是否受到因动机状态变化导致的奖励值下降的调节.
- 检查感官特异性和,奖励值推理和RewP之间的关系.
主要方法:
- 参与者 (n=31) 进行了脑电图记录,同时进行了修改的门任务,并使用了帕夫洛夫条件.
- 使用食物增强剂 (甜味和味),其中一种通过通过吃到腹而值.
- 在强化器值之前和之后,分析了行为选择 (赢-停留/输-切换) 和 RewP 幅度.
主要成果:
- 参与者在值后的食物偏好中表现出特定的感官调整,他们更喜欢非和的食物.
- 尽管感知愉悦度和行为偏好发生了显著变化,但RewP幅度没有发现显著差异.
- RewP信号对强化器值操纵保持不敏感.
结论:
- 奖励积极性 (RewP) 似乎无法追踪由动机状态转移 (足) 驱动的奖励价值的推断变化.
- 在这种情况下,情感和动机因素,包括基于奖励价值下降的推断,并没有调节 RewP.
- 这些发现挑战了RewP仅仅反映了受到内部状态影响的奖励价值更新的概念.
更多相关视频
相关概念视频
Reinforcement
842
Positive and negative reinforcement are key concepts in operant conditioning, a learning process where the consequences of a behavior affect the likelihood of that behavior being repeated.
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
842
Punishment
878
Negative reinforcement and punishment are often confused but serve distinct functions in behavior modification. Reinforcement, whether positive or negative, increases the likelihood of a desired behavior, while punishment decreases it.
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior....
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior....
878
Primary and Secondary Reinforcers
868
In psychology, reinforcement is a key concept in behavior modification. B.F. Skinner demonstrated this with his experiments involving rats in what is known as a Skinner box. The rats learned to press a lever to receive food, a primary reinforcer that fulfilled their innate need for nourishment.
Effective reinforcers for humans vary depending on the individual and the context. Primary reinforcers, such as food, water, sleep, shelter, and pleasure, have inherent value and satisfy basic biological...
Effective reinforcers for humans vary depending on the individual and the context. Primary reinforcers, such as food, water, sleep, shelter, and pleasure, have inherent value and satisfy basic biological...
868
Unrealistic Optimism Bias
214
Unrealistic optimism bias is the tendency to overestimate the likelihood of positive outcomes. This cognitive bias makes individuals believe they are less likely to experience failures, setbacks, or risks and more likely to succeed than others. For example, people may assume they are less prone to health issues, accidents, or financial struggles than their peers, even when they share similar risk factors.One key component of this bias is the above-average effect, where individuals perceive...
214
Operant Conditioning
2.7K
Operant conditioning, a key concept in behavioral psychology, involves using reinforcement and punishment to alter the likelihood of a behavior being repeated. B.F. introduced this type of conditioning. Skinner focused on voluntary behaviors and the consequences that follow them, influencing whether these behaviors will be strengthened or diminished.
Reinforcement in operant conditioning can be positive or negative, both of which serve to increase the likelihood of a behavior. Positive...
Reinforcement in operant conditioning can be positive or negative, both of which serve to increase the likelihood of a behavior. Positive...
2.7K
Timing and Consequences on Behavior
360
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...
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...
360


