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Related Concept Videos

Reinforcement01:23

Reinforcement

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:
Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

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 factor...
Reinforcement Schedules01:24

Reinforcement Schedules

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,...
Generalization, Discrimination, and Extinction01:24

Generalization, Discrimination, and Extinction

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...
Primary and Secondary Reinforcers01:23

Primary and Secondary Reinforcers

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...
Law of Effect01:06

Law of Effect

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 boxes...

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Related Experiment Video

Updated: May 23, 2026

Investigating Motor Skill Learning Processes with a Robotic Manipulandum
07:52

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Reward magnitude determines reinforcement learning efficiency.

Sheng Gong1, Alyssa Martell1, Joshua T Dudman1

  • 1Mechanistic Cognitive Neuroscience, Janelia Research Campus of the Howard Hughes Medical Institute, Ashburn, VA, USA.

Science (New York, N.Y.)
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Large rewards significantly enhance animal learning efficiency and task engagement by increasing dopamine release. This suggests reinforcement learning potential in animals is often underestimated.

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Related Experiment Videos

Last Updated: May 23, 2026

Investigating Motor Skill Learning Processes with a Robotic Manipulandum
07:52

Investigating Motor Skill Learning Processes with a Robotic Manipulandum

Published on: February 12, 2017

Pavlovian Conditioned Approach Training in Rats
06:57

Pavlovian Conditioned Approach Training in Rats

Published on: February 4, 2016

Studying Food Reward and Motivation in Humans
12:09

Studying Food Reward and Motivation in Humans

Published on: March 19, 2014

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Learning and Memory

Background:

  • Standard animal learning research often uses small rewards to maximize behavior repetition.
  • The impact of reward magnitude on initial learning is not fully understood.

Purpose of the Study:

  • To investigate how reward magnitude influences initial learning in mice across various behavioral paradigms.
  • To explore the role of dopamine signaling in mediating the effects of reward magnitude on learning.

Main Methods:

  • Tested learning efficiency in naïve mice across five distinct behavioral paradigms.
  • Measured ventral striatal dopamine release in response to varying reward sizes.
  • Utilized optogenetics to manipulate dopamine reward responses.

Main Results:

  • Larger rewards substantially improved learning efficiency, affecting within- and across-session learning and task engagement.
  • Ventral striatal dopamine release duration and magnitude scaled with reward size.
  • Optogenetic enhancement of dopamine responses partially replicated the learning benefits of large rewards.

Conclusions:

  • Animal reinforcement learning efficiency may be underestimated in traditional studies.
  • Dopamine signaling of reward magnitude is crucial for mediating task engagement.
  • Reward magnitude directly influences learning efficiency through dopamine pathways.