Reinforcement Schedules in Operant Conditioning: Types and Effects

What is a reinforcement schedule?

A reinforcement schedule determines the rules by which a particular response will be followed by a reward.

What are the two main categories of reinforcement schedules?

Ratio schedules and interval schedules.

What is a fixed ratio (FR) schedule?

A schedule where reinforcement is delivered after a fixed number of responses is made.

What is an example of a fixed ratio schedule?

With an FR 10 schedule, the animal receives a reward after the 10th operant response.

What is a continuous reinforcement (CRF) schedule?

An FR 1 schedule where the animal receives a reward following each response.

What is a post-reinforcement pause?

A short break taken by animals after receiving reinforcement in fixed ratio schedules.

What characterizes a variable ratio (VR) schedule?

The required number of responses for reinforcement varies around a specified average ratio.

How does a variable ratio schedule affect responding?

Responding tends to be steadier with a VR schedule because the number of responses required for the next reward is unpredictable.

What is a fixed interval (FI) schedule?

A schedule where reinforcement is delivered after the first operant that occurs after a fixed interval of time has elapsed.

What is an example of a fixed interval schedule?

With an FI 10 second schedule, a reward will be available for delivery 10 seconds after the last reinforcement.

What pattern of responding is typically seen with fixed interval schedules?

A 'scalloped' pattern of responding, where subjects learn to wait to respond until near the end of the specified interval.

What is a variable interval (VI) schedule?

A schedule where reinforcement is based on varying amounts of time that have passed since the last reinforcement.

How does a cumulative response plot reflect behavior?

It shows the rate at which the animal is responding over time.

What does a steeper cumulative response plot indicate?

It indicates a higher rate of responding.

What is the significance of the cumulative response plot in studying reinforcement?

It allows researchers to observe instrumental responding in real time.

What is the impact of reinforcement schedules on motivation?

Studying reinforcement schedules helps us understand the interaction between the reinforcement process and motivational mechanisms.

What happens to responses during the interval in a fixed interval schedule?

Operants made during the interval are ignored and go unrewarded.

What is the role of a 'limited hold' in fixed interval schedules?

It imposes a restriction on how long the reward remains available after the interval elapses.

What is the effect of variable ratio schedules on post-reinforcement pauses?

Post-reinforcement pauses are less likely with variable ratio schedules.