In AP Psychology, discrimination has two meanings: in classical and operant conditioning, it's an organism's learned ability to respond to a specific stimulus but not to similar ones; in social psychology, it's unjust behavior toward members of a group, usually fueled by stereotypes and prejudiced attitudes.
Discrimination is one of those AP Psych terms that means two completely different things depending on which unit you're in, and the exam expects you to know both.
In learning (classical and operant conditioning): discrimination is the ability to tell stimuli apart and respond only to the right one. Pavlov's dog that salivates to a specific tone but not to a slightly higher tone is discriminating. It's the opposite of stimulus generalization, where similar stimuli trigger the same conditioned response. In operant conditioning, discrimination means an organism learns that a behavior gets reinforced only in the presence of a particular stimulus, like a pigeon pecking only when the green light is on.
In social psychology (Unit 4): discrimination is the behavior end of a three-part chain. A stereotype is a generalized concept about a group. Prejudice is the negative attitude built on that stereotype. Discrimination is when the attitude turns into action, treating someone unfairly because of their group membership. Per the CED, stereotypes and implicit attitudes (ones you hold without realizing it) are frequently the basis of prejudiced attitudes and discriminatory behaviors. Concepts like in-group bias, out-group homogeneity bias, ethnocentrism, and the just-world phenomenon all help explain where discrimination comes from.
The social-psych meaning is directly named in learning objective AP Psych Revised 4.2.A, which asks you to explain how stereotypes and implicit attitudes contribute to prejudice and discrimination. That makes the stereotype → prejudice → discrimination chain core Unit 4 content, alongside related ideas like belief perseverance and cognitive dissonance (AP Psych Revised 4.2.B), which explain why prejudiced attitudes are so hard to change. The learning-theory meaning shows up in the classical and operant conditioning topics, where discrimination and generalization are a classic paired concept the exam loves to test side by side. Knowing which version a question is asking about is half the battle.
Keep studying AP Psychology Unit 9
Stimulus Generalization (Topics 4.2-4.3)
Generalization and discrimination are mirror images. Generalization means similar stimuli produce the same conditioned response; discrimination means the organism has learned to respond to one specific stimulus and ignore the look-alikes. If you can explain one, you can explain the other by flipping it.
Stereotypes and Implicit Attitudes (Unit 4)
This is the single closest social-psych link. Stereotypes reduce cognitive load by lumping people into categories, but they feed prejudiced attitudes, and those attitudes drive discriminatory behavior. The CED treats this chain as one package under AP Psych Revised 4.2.A.
Cognitive Dissonance Theory (Unit 4)
Dissonance explains why discrimination can reinforce prejudice. If someone acts unfairly toward a group, the mismatch between behavior and self-image creates discomfort, and one easy way to resolve it is to adopt attitudes that justify the behavior.
B.F. Skinner and Operant Conditioning (Topic 4.3)
In Skinner's framework, discrimination means learning that reinforcement only follows a behavior in the presence of a specific cue. A rat that presses the lever only when a light is on has formed a discrimination, which is how organisms learn when a behavior actually pays off.
Multiple-choice questions usually test the learning-theory meaning through scenarios. A typical stem describes an animal or person responding to one stimulus but not similar ones, and you pick "discrimination" over distractors like generalization, extinction, or acquisition. Practice questions in this area lean hard on the discrimination-versus-generalization contrast, so read carefully whether the similar stimulus does or does not trigger the response. The social-psych meaning shows up in questions about stereotypes, implicit attitudes, in-group bias, and ethnocentrism, where you need to label the behavior (discrimination) versus the attitude (prejudice) versus the belief (stereotype). On free-response questions like the AAQ, the directions explicitly require appropriate psychological terminology, so using "discrimination" precisely, and in the right sense for the scenario, is exactly the kind of accuracy that earns points.
These are opposites, and the exam tests the difference constantly. Generalization is when stimuli similar to the conditioned stimulus produce the conditioned response (a dog conditioned to a bell also salivates to a doorbell). Discrimination is when the organism responds only to the original stimulus and not to similar ones (the dog salivates to the bell but ignores the doorbell). Quick check: if the similar stimulus works, it's generalization; if it doesn't, it's discrimination.
Discrimination has two AP Psych meanings: a learned ability to respond only to a specific stimulus (conditioning) and unfair behavior toward members of a group (social psychology).
In conditioning, discrimination is the opposite of generalization, so the organism responds to the conditioned stimulus but not to similar stimuli.
In social psychology, the chain runs stereotype (belief) to prejudice (attitude) to discrimination (behavior), and the exam expects you to label each link correctly.
Implicit attitudes, in-group bias, out-group homogeneity bias, ethnocentrism, and the just-world phenomenon all help explain why discrimination happens, per learning objective AP Psych Revised 4.2.A.
Belief perseverance and confirmation bias explain why prejudiced attitudes that fuel discrimination persist even when the evidence contradicts them.
On scenario-based questions, decide first which meaning of discrimination is in play before picking an answer.
It depends on the unit. In classical and operant conditioning, discrimination is responding to a specific stimulus but not to similar ones. In social psychology, it's unfair behavior toward people based on their group membership, usually rooted in stereotypes and prejudice.
No. Prejudice is the attitude (a negative evaluation of a group), while discrimination is the behavior (acting unfairly toward group members). The CED explicitly frames stereotypes and prejudiced attitudes as the basis of discriminatory behaviors, so keep belief, attitude, and behavior separate.
Generalization means similar stimuli trigger the same conditioned response; discrimination means only the original conditioned stimulus does. If Pavlov's dog salivates to every bell-like sound, that's generalization. If it salivates only to one exact tone, that's discrimination.
It's the same word for two unrelated concepts. Learning theorists use it for telling stimuli apart, while social psychologists use it for unjust group-based behavior under learning objective AP Psych Revised 4.2.A. AP questions give you scenario context, so identify which meaning fits before answering.
Yes, in both senses. Multiple-choice questions regularly test discrimination versus generalization in conditioning scenarios, and the stereotype-prejudice-discrimination chain is named directly in the CED's social psychology learning objectives, making it fair game for both MCQs and free-response questions.