AP Psych EBQ — What It Is and How to Write It (2026)
The EBQ — Evidence-Based Question — is one of the two free response questions on the AP Psychology exam. It is worth approximately 7 points and tests your ability to apply psychological concepts to real-world scenarios using evidence. This guide explains exactly what the EBQ asks and how to write a response that earns full credit.
What Is the EBQ in AP Psychology?
The Evidence-Based Question (EBQ) presents a real-world scenario — a situation involving human behavior — and asks you to:
- Identify a psychological concept, theory, or research finding
- Apply it to explain the behavior described in the scenario
- Use evidence to support your explanation
Unlike the older FRQ format, the EBQ specifically rewards students who can connect abstract psychology concepts to concrete behavioral examples. "Evidence" in this context means the specific details from the scenario — not outside research studies.
AP Psych EBQ Format (2026)
The AP Psychology exam has two FRQs in Section II:
| FRQ | Type | Points | Time |
|---|---|---|---|
| FRQ 1 | Concept Application (AAQ) | ~7 pts | ~25 min |
| FRQ 2 | Evidence-Based Question (EBQ) | ~7 pts | ~25 min |
Total FRQ section: ~14 points, ~50 minutes
The EBQ is one of the two most-changed elements of the 2024 AP Psychology redesign. It replaced the older "research design" FRQ format and now emphasizes applying psychological evidence to evaluate real-world situations.
EBQ Rubric — What Earns Points
The EBQ rubric rewards three things:
1. Identify the psychological concept (1–2 pts) Name the specific concept, theory, or research finding. Vague answers earn nothing.
❌ "This is an example of psychology affecting behavior." ✅ "This behavior demonstrates the bystander effect — the tendency for individuals to be less likely to offer help in an emergency when others are present."
2. Apply the concept to the scenario (2–3 pts) Use specific details from the scenario as evidence. This is the most important part of the EBQ. Generic applications earn partial credit. Scenario-specific applications earn full credit.
❌ "The bystander effect explains why people don't help." ✅ "In the scenario, Maria hesitates to call for help because there are 20 other bystanders present. Each bystander experiences diffusion of responsibility — the assumption that someone else will act — which collectively reduces the likelihood that any individual intervenes."
3. Explain the psychological mechanism (1–2 pts) Explain why the concept produces the behavior — not just that it does. This is what separates 5-point responses from 7-point responses.
✅ "Diffusion of responsibility occurs because the presence of others reduces each person's felt obligation to act. The larger the crowd, the smaller each individual's perceived personal responsibility — even though the total number of witnesses is greater."
How to Structure an EBQ Response
Recommended structure (25 minutes, ~3–4 paragraphs):
Paragraph 1 — Identify the concept: State the psychological concept by name. Define it precisely. One to two sentences.
Paragraph 2 — Apply to the scenario: Quote or reference specific details from the scenario. Connect each detail to the concept. This is the bulk of your response.
Paragraph 3 — Explain the mechanism: Explain the psychological process that produces the behavior. Why does this concept cause this outcome? Reference research or theory if relevant.
Optional Paragraph 4 — Alternative explanation: Some EBQ prompts ask you to consider a competing explanation or evaluate the evidence. Address this if the prompt asks for it.
Full Example: EBQ Prompt and Response
Prompt:
Marcus is driving on the highway when he sees a car pulled over with its hazard lights flashing. There are dozens of other cars passing without stopping. Marcus considers stopping but decides someone else will probably help and continues driving. Use psychological research to explain Marcus's behavior.
Sample Full-Credit Response:
Marcus's behavior illustrates the bystander effect, a phenomenon documented by social psychologists Bibb Latané and John Darley following the 1964 Kitty Genovese case. The bystander effect refers to the finding that individuals are less likely to offer help in an emergency when other people are present.
In this scenario, the key factor is the presence of dozens of other passing cars. Each driver, including Marcus, experiences diffusion of responsibility — the psychological tendency for individuals to feel less personally obligated to act when they believe others share the responsibility. Marcus's thought that "someone else will probably help" is a direct expression of this process.
The mechanism works as follows: in an emergency, the total responsibility for helping is distributed across all bystanders. With dozens of cars passing, Marcus perceives his individual share of that responsibility as very small. This reduces his motivation to stop, even though the total number of witnesses is large. Research by Darley and Latané (1968) showed that as group size increased, the percentage of participants who helped in a staged emergency decreased significantly — consistent with what Marcus experiences on the highway.
A secondary factor is pluralistic ignorance: each driver looks at the others passing without stopping and interprets this as evidence that the situation is not an emergency, further reducing the perceived need to help.
Common EBQ Mistakes
Naming the concept without defining it. "This is confirmation bias" earns one point. "This is confirmation bias — the tendency to search for, interpret, and recall information in a way that confirms one's existing beliefs" earns more.
Generic application. "The bystander effect explains why Marcus didn't stop" ignores the specific details of the scenario. Use the exact numbers, names, and circumstances from the prompt.
Skipping the mechanism. Identifying what happens is not enough. AP readers want to know why — what psychological process produces this behavior.
Writing about research instead of the scenario. The EBQ does not require you to cite specific studies. Use the scenario as your evidence. Research knowledge helps you explain the mechanism, but the scenario details are your primary evidence.
AP Psych Concepts Most Commonly Tested on EBQs
Based on released practice materials, these concepts appear frequently:
- Bystander effect / diffusion of responsibility
- Fundamental attribution error (overestimating personality, underestimating situation)
- Confirmation bias
- Operant conditioning (reinforcement schedules)
- Cognitive dissonance
- Availability heuristic
- Social facilitation / social loafing
- Conformity (Asch studies)
- Obedience (Milgram studies)
- Self-fulfilling prophecy
For each concept, know: the definition, the mechanism, and at least one real-world example you can adapt.