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Related Concept Videos

Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

161
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...
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Reinforcement Schedules01:24

Reinforcement Schedules

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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,...
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Long-term Potentiation01:35

Long-term Potentiation

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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Motor Unit Stimulation01:20

Motor Unit Stimulation

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When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
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Law of Effect01:06

Law of Effect

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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.
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Related Experiment Video

Updated: Sep 23, 2025

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
10:39

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

Published on: May 3, 2018

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Reward timing matters in motor learning.

Pierre Vassiliadis1,2, Aegryan Lete1, Julie Duque1

  • 1Institute of Neuroscience, Université Catholique de Louvain, 53, Avenue Mounier, 1200 Brussels, Belgium.

Iscience
|May 16, 2022
PubMed
Summary
This summary is machine-generated.

Reward timing significantly impacts motor skill learning and memory consolidation. A short delay (1s) enhances continuous improvement, while a long delay (6s) leads to faster initial learning but poorer long-term skill retention.

Keywords:
Behavioral neuroscienceBiological sciencesClinical neuroscience

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Last Updated: Sep 23, 2025

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Area of Science:

  • Neuroscience
  • Motor Learning
  • Cognitive Psychology

Background:

  • Reward timing is a critical factor in reinforcement learning.
  • Its influence on motor skill acquisition and memory consolidation remains less understood.

Purpose of the Study:

  • To investigate the effect of reward timing on motor learning dynamics.
  • To examine how reward delay influences the consolidation of newly acquired motor skills.

Main Methods:

  • 60 healthy participants trained a new motor skill under different reward delay conditions (1s vs. 6s).
  • Performance was tracked throughout training, and overnight memory consolidation was assessed.

Main Results:

  • A short reward delay (1s) resulted in continuous performance improvements.
  • A long reward delay (6s) led to initial rapid learning but an early performance plateau and reduced overnight memory consolidation.

Conclusions:

  • Reward timing critically modulates the dynamics of motor learning and skill consolidation.
  • These findings have implications for designing effective motor rehabilitation strategies.