Learning

This is Unit Five of Psychology, Part One: classical conditioning. This is the most labelled topic in the whole course. One mechanism, five roles, and a vocabulary that has to be assigned correctly before anything can be said about a case at all. So the part is built around labelling. The five roles get defined, then a method for assigning them — which depends on when you look, because the same stimulus carries different labels before training, during it, and after. Then four cases, labelled: a laboratory study, a child's fear of a clinic, a patient's nausea before treatment, and an advertisement. Four settings that look nothing alike, running the same five roles. And the part ends by correcting what the mechanism is a theory of. Repeated pairing is not what produces conditioning. What matters is how reliably one thing predicts the other — which means what gets learned is a prediction, not a coincidence. By the end you will be able to do five things. One: name the five roles at each stage of training. Two: label any conditioning case, in any setting. Three: say what extinction weakens and what recovery shows. Four: say what generalization and discrimination each describe. Five: say why pairing alone does not produce conditioning.

Two entries opening the unit. A definition with two qualifications in it that both matter — and then the least elaborate form of learning there is, which involves no pairing, no consequence, and nothing but repetition.

The definition.

Psych 0491 Learning

A relatively permanent change in behavior or knowledge resulting from experience. Relatively permanent rules out fatigue and mood; from experience rules out maturation. Both qualifications are load-bearing.

The simplest form.

Psych 0493 Habituation

A decrease in response to a stimulus after repeated harmless exposure. Harmless is part of it — the organism learned that nothing follows.

Six entries. The mechanism, and then the five labels — and the thing to notice is that three of the five are the same physical events wearing different names depending on the stage of training.

The mechanism.

Psych 0495 Classical Conditioning

Learning in which a neutral stimulus comes to trigger a response after being paired with a stimulus that already triggers it. The response was there first; the trigger is what changes.

The first role.

Psych 0497 The Unconditioned Stimulus

The stimulus that triggers a response naturally, without prior learning. It is the one thing in the arrangement that was working before anybody started.

Its response.

Psych 0499 The Unconditioned Response

The automatic, unlearned reaction to that stimulus. Also present from the start, and also not what the training changes.

The third role.

Psych 0501 The Neutral Stimulus

The stimulus producing no relevant response before conditioning begins. Relevant is the word — it may produce plenty of responses, none of them the one in question.

What it becomes.

Psych 0503 The Conditioned Stimulus

The formerly neutral stimulus, now triggering a response after pairing. Same physical event as the previous role, at a different point in the process.

And its response.

Psych 0505 The Conditioned Response

The learned reaction produced by that conditioned stimulus. It usually resembles the unconditioned response closely, and it is a different thing with a different cause.

Two entries, and the second is the method the rest of this part depends on. A case gets labelled by naming each stimulus and response by its role at three separate times — because the labels change and the events do not.

During.

Psych 0507 Acquisition

The period during which the pairing is repeated and the conditioned response strengthens. A process rather than a moment.

The method.

Psych 0509 Labeling a Conditioning Diagram

Naming each stimulus and response by its role before training, during training, and after. Three passes over the same case, and the assignment differs on each pass.

Two entries on what happens when the pairing stops. The response weakens — and then, after a rest with no further training, some of it comes back. Which tells you something important about what extinction actually did.

Stopping the pairing.

Psych 0511 Extinction in Classical Conditioning

The weakening of a conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned one. The prediction stopped holding, and the response follows.

And the return.

Psych 0512 Spontaneous Recovery

The reappearance of an extinguished response after a period of rest. Which shows extinction did not erase the original learning — it added something on top of it.

Three entries on how far a conditioned response reaches. It spreads to things that resemble the stimulus, it can be narrowed to only the stimulus itself, and a conditioned stimulus can be used to condition something else again.

Spreading.

Psych 0514 Stimulus Generalization

Responding to stimuli resembling the conditioned stimulus without those having been paired themselves. Resemblance alone is enough to carry the response.

Narrowing.

Psych 0515 Stimulus Discrimination

Responding to the conditioned stimulus and not to similar stimuli that were never paired. The opposite of the previous entry, and it has to be trained.

Building on it.

Psych 0517 Higher-Order Conditioning

An established conditioned stimulus used to condition a second neutral stimulus. The learning stacks, which is how conditioning reaches things that were never near the original stimulus at all.

Three entries. One canonical study, taught with its ethical standing attached rather than mentioned afterwards — and then a phenomenon that violates the usual rules of the mechanism and is real anyway.

The study.

Psych 0519 The Little Albert Study

Watson and Rayner conditioned a fear response in an infant by pairing a white rat with a sudden loud noise. The demonstration worked, which is why it is still cited.

And its standing.

Psych 0520 Little Albert and Research Ethics

It is canonical in the conditioning literature and would not receive ethical approval under current review standards. Both facts are true at once, and the course states them together rather than choosing one.

The exception.

Psych 0522 Taste Aversion Learning

Conditioned avoidance of a food after a single pairing with illness, often hours later. One pairing and a long delay — both of which ordinary conditioning says should not work.

Four entries running the same labelling method on four settings that could not look less alike. A laboratory, a clinic, a treatment room, and an advertisement — and the fourth is worth attention, because somebody built it deliberately.

The laboratory.

Psych 0524 Labeling Pavlov's Dogs

The food is the unconditioned stimulus, salivation to food the unconditioned response, and the tone becomes the conditioned stimulus. The canonical assignment.

The clinic.

Psych 0526 Labeling a Fear of the Doctor's Office

The injection is the unconditioned stimulus and the waiting room becomes the conditioned stimulus. Nobody trained this deliberately and the mechanism ran anyway.

The treatment room.

Psych 0528 Labeling Anticipatory Nausea

The drug is the unconditioned stimulus and the treatment room becomes the conditioned stimulus. A clinically important case, produced by the same five roles.

And the advertisement.

Psych 0530 Labeling an Advertisement

The music is the unconditioned stimulus and the product becomes the conditioned stimulus. Which is the mechanism used on purpose, by people who know exactly which role they are assigning.

Three entries closing the part, and they change what the whole topic is about. Repeated pairing does not produce conditioning. Reliable prediction does — and the difference means an organism is learning a relationship rather than accumulating coincidences.

What matters.

Psych 0532 Contingency in Conditioning

Conditioning depends on how reliably the conditioned stimulus predicts the unconditioned one, not merely on how often they occur together. Reliability, rather than frequency.

The error.

Psych 0533 The "Pairing Is Enough" Error

Thinking repeated pairing alone produces conditioning regardless of how predictive that pairing is. It is the reading the earlier entries invite, and it is wrong.

And the correction.

Psych 0535 Prediction Is What Is Learned

What is learned is the predictive relationship between two stimuli, not their co-occurrence. Which makes conditioning a form of learning about the world rather than an accumulation of associations.

Five things you can now do, and Part Two takes up consequences. You can name the five roles at each stage — unconditioned stimulus and response present from the start, a neutral stimulus that becomes the conditioned one, and the learned response it produces. You can label any case in any setting, from a laboratory tone to an advertisement's music, using the same three passes. You can say what extinction weakens and what spontaneous recovery shows — that extinction added something rather than erasing the original learning. You can say what generalization and discrimination describe: responding to what resembles the stimulus, and responding only to the stimulus itself. And you can say why pairing alone is not enough — conditioning depends on how reliably one stimulus predicts the other, so what gets learned is a prediction.