Classical Conditioning and Skinner's Operant Conditioning Principles

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Classical Conditioning and Skinner's Operant Conditioning Principles

Psychology of Personality · Chapter 8: Behavioral and Learning TheoriesSection 8.2 · lesson 47 of 838 min · free with a free account

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In this lesson

Two different questions about learning, and the confusion that follows from mixing them up.

  • Describe Pavlov's demonstration and name its four elements
  • Explain acquisition, extinction, generalization and discrimination
  • Distinguish reinforcement from punishment in both directions
  • Explain how schedules of reinforcement change persistence

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Transcript

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Behavioral and Learning Theories

Classical and Operant Conditioning

A bell means nothing to a dog. Food means a great deal. So how does the bell come to do the work of the food? That question defines classical conditioning. But there is a second, different question about learning. Not what signals came before the behavior, but what happened after it. That question defines operant conditioning. These two are constantly confused, and the confusion is expensive. This section keeps them apart, and shows how they work together in ordinary life.

The Question

How Does a Neutral Thing Come to Matter?

Ivan Pavlov demonstrated classical conditioning first, and the demonstration is worth stating precisely. Dogs salivate to food. That link needs no explanation and no training. A bell, at the start, produces nothing at all. Pavlov paired the two, repeatedly. And after enough pairings, the bell alone produced salivation. Notice what actually changed, because it is easy to get this wrong. Salivation was already in the dog's repertoire. It was not learned. What was learned was what triggers it. Classical conditioning transfers an existing response to a new signal.

The Vocabulary

Four Terms That Structure the Process

Four terms structure the process, and they are worth learning properly. The unconditioned stimulus is one that naturally triggers a response. The food. The unconditioned response is what that stimulus produces automatically. Salivation to food. The conditioned stimulus is the formerly neutral one, which triggers a response after pairing. The bell. And the conditioned response is the learned response to that conditioned stimulus. One warning about the word unconditioned. It means unlearned. Nothing more. It does not mean unconditional, or automatic in some loose sense. It simply marks the link that was already there before any pairing took place.

The Sequence

How an Association Forms and Fades

The full sequence has more stages than the famous version suggests. Before learning, food produces salivation, and the bell means nothing. During pairing, the bell and the food are presented together, repeatedly. At acquisition, the bell alone now produces salivation. The association is installed. Then, if the pairing stops, extinction sets in and the response weakens. But extinction is not erasure, and this is the interesting part. After a pause, the response can return on its own. That return is called spontaneous recovery. Which tells us the original association was suppressed, rather than deleted.

Refinement

Generalization and Discrimination

Two further phenomena describe how an association gets sharpened once it exists. Generalization means similar stimuli come to trigger the same response. A dog conditioned to one bell may also salivate to a similar tone. Discrimination is the opposite refinement. The organism learns to respond to one stimulus, and not to its near neighbour. Together these two explain both over-reaction and precision. Generalization is why a fear can spread beyond the thing that caused it. Discrimination is why it can be narrowed again. So acquisition, extinction, spontaneous recovery, generalization and discrimination form one set. They describe how associations are formed, weakened, and refined.

A Different Question

Skinner Asks What Happens Afterwards

Skinner was asking a different question about learning. In operant conditioning, the consequences of a behavior determine how likely it is to recur. The difference from Pavlov is one of order. In classical conditioning, the significant event comes before the response. In operant conditioning, it comes after. Put another way, classical learning is about association between two stimuli. The organism is largely a recipient of what happens to it. Operant learning is about the consequences of behavior. The organism acts first, and the world answers. Skinner studied this systematically, using the operant chamber, often called the Skinner box.

The Consequences

Four Cells and One Rule

Operant consequences sort into a small number of cases. Positive reinforcement increases behavior. Praise for finishing work. Negative reinforcement also increases behavior. A seatbelt alarm that stops. Positive punishment decreases behavior. An extra chore for misconduct. Negative punishment also decreases behavior. Losing screen time. And extinction decreases behavior by withdrawing reinforcement altogether. Ignoring attention-seeking is the standard example. Look at the middle column, because that is where the structure lives. Two of these strengthen behavior. Three of them weaken it.

The Confusion

Negative Reinforcement Is Not Punishment

Here is the single most common error in this whole topic. Treating negative reinforcement as a kind of punishment. The words positive and negative describe whether a stimulus is added or removed. They do not mean pleasant and unpleasant. Reinforcement strengthens behavior. Always. Whether it adds something pleasant, or removes something unpleasant. Punishment weakens behavior. Always. Whether it adds something unpleasant, or removes something pleasant. So the test is never how the consequence feels. The test is the direction of the effect. Did the behavior become more frequent, or less? A seatbelt alarm that stops when you buckle up removes something unpleasant. It makes you more likely to buckle up next time. That is reinforcement.

Schedules

Why Unpredictable Rewards Last Longest

Schedules of reinforcement turn out to matter as much as reinforcement itself. A schedule is simply the rule determining when reinforcement is delivered. Under a fixed-ratio schedule, reinforcement follows a set number of responses. Under a variable-ratio schedule, the number is unpredictable. And variable schedules produce especially durable responding. That result is genuinely counter-intuitive, so sit with it. Behavior reinforced every single time extinguishes quickly once the reward stops. The absence of the reward is immediately obvious. Behavior reinforced unpredictably is far more resistant to extinction. Because a run of nothing is exactly what the organism has learned to expect.

In Practice

Both Forms Inside One Routine

It would be a mistake to treat these as rival explanations. They usually operate side by side, on the same person, in the same hour. Take a child and a dentist. A painful visit conditions anxiety to the sight of the waiting room. That is classical. The same child brushes regularly, because doing so earns parental praise. That is operant. One routine, two learning processes, running at once. So asking which one is it is usually the wrong question. Asking which part of the behavior each one explains is the right one.

Consolidate

Two Learnings, Two Tests

Two learnings, and two tests to keep them apart. Classical conditioning is learning by association between stimuli. Operant conditioning is learning by the consequences of behavior. Reinforcement strengthens the action that precedes it. Punishment weakens it. Positive and negative describe adding and removing, not good and bad. And variable schedules make behavior more resistant to extinction than continuous ones. Those principles are not confined to laboratories. The next section takes them into classrooms and clinics, where Skinner insisted they belonged.

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FAQ

Questions students ask us

About Classical Conditioning and Skinner's Operant Conditioning Principles

What is the difference between classical and operant conditioning?
Classical conditioning is learning by association between two stimuli, while operant conditioning is learning from the consequences of a behavior. In classical conditioning the key event comes before the response, and an existing response is transferred to a new signal, as when Pavlov's dogs salivated to a bell. In operant conditioning, studied by B. F. Skinner, the organism acts first and the consequence changes how likely the behavior is to recur.
What are the unconditioned and conditioned stimulus in Pavlov's experiment?
In Pavlov's experiment, food was the unconditioned stimulus and salivation to food was the unconditioned response. The bell, at first neutral, became the conditioned stimulus after repeated pairing with food, and salivation to the bell alone was the conditioned response. Unconditioned simply means unlearned. If the bell is then presented without food, the response weakens through extinction, though it can return after a pause through spontaneous recovery.
Is negative reinforcement the same as punishment?
No, negative reinforcement strengthens a behavior, while punishment weakens it. Positive and negative mean adding or removing a stimulus, not good or bad. A seatbelt alarm that stops when you buckle up removes something unpleasant and makes buckling up more likely, so it is negative reinforcement. Positive punishment adds something unpleasant, such as an extra chore, and negative punishment removes something pleasant, such as screen time.
Why does variable-ratio reinforcement make behavior hard to extinguish?
Behavior reinforced on a variable-ratio schedule resists extinction because the learner has come to expect long runs without reward. On a variable-ratio schedule, reinforcement follows an unpredictable number of responses, unlike a fixed-ratio schedule, where the number is set. Behavior reinforced every time extinguishes quickly once rewards stop, because the missing reward is immediately obvious. After unpredictable reinforcement, a run of nothing looks normal.

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