Research Method in AP Psychology

In AP Psychology, a research method is the specific approach a psychologist uses to collect data and test a question or hypothesis, such as an experiment, correlational study, survey, case study, or naturalistic observation. Identifying and evaluating the method is the core skill of Science Practice 2.

What is Research Method?

A research method is the game plan a psychologist uses to answer a question with data. Do you manipulate something and measure the result? That's an experiment. Do you measure two things as they naturally occur and see if they move together? That's a correlational study. Other options include asking lots of people questions (a survey), studying one person or group in depth (a case study), or watching behavior in a real-world setting (a naturalistic observation).

The AP Psych CED sorts these into two big buckets, experimental and non-experimental methodologies. That split matters because it decides what conclusions you're allowed to draw. Only a true experiment, with random assignment and a manipulated independent variable, can support a cause-and-effect claim. Every non-experimental method can describe behavior or reveal relationships, but it can't prove that one thing caused another. Think of the research method as the lens on a camera. It decides what you can see clearly and what stays blurry.

Why Research Method matters in AP® Psychology

Research method isn't tied to one unit. It lives in Science Practice 2 – Research Methods and Design, a course-wide skill that gets applied to content from every unit. It supports all four Science Practice 2 skills. Under 2.A, you determine the type of research design used in a given study. Under 2.B, you evaluate design elements in experimental methodology. Under 2.C, you evaluate design elements in non-experimental methodologies. Under 2.D, you judge whether a study followed appropriate ethical procedures. In practice, any study you see on the exam, whether it's about memory, development, or social behavior, starts with the same first question. What method did the researchers use, and what does that let them conclude?

How Research Method connects across the course

Experimental Design (Science Practice 2)

Experimental design is the one research method that can show causation. Researchers manipulate an independent variable, randomly assign participants, and compare an experimental group to a control group. If you can spot those pieces in a study, you've identified an experiment. If any are missing, you're looking at a non-experimental method.

Correlational Studies (Science Practice 2)

Correlational research measures two variables without changing either one. It can tell you that sleep and grades rise together, but not that sleep causes better grades. A third variable could be driving both. This is the most-tested limitation in the whole practice.

Case Study, Survey Method, and Observational Study (Science Practice 2)

These are the other non-experimental tools, and each trades something away. A case study goes deep on one person but is hard to generalize. A survey reaches many people but relies on honest self-report. Naturalistic observation captures real behavior but gives the researcher no control. Skill 2.C asks you to weigh exactly these trade-offs.

Deception, Confederates, and Debriefing (Science Practice 2)

The method a researcher picks shapes the ethical questions you have to ask. Some experiments use a confederate (an actor working for the researcher) or deception to keep participants from guessing the hypothesis. Debriefing and confidentiality are how researchers make that ethically acceptable, which is the focus of skill 2.D.

Is Research Method on the AP® Psychology exam?

Research method shows up most directly in the Article Analysis Question (AAQ). The 2025 AAQ Q1 gave you a real study on how different amounts of misinformation affect memory of an event, with 127 student participants. You then wrote six parts (A through F) in complete sentences using psychological terminology. The 2026 AAQ Q1 used the same six-part format. AAQ parts like these line up with Science Practice 2. You identify the research design (2.A), pick out variables or design elements (2.B and 2.C), and judge ethics or generalizability (2.D).

On multiple choice, expect short study scenarios followed by stems like "Which research method was used?" or "Which conclusion is justified by this study?" The trap answer almost always claims causation from a correlational or observational study. Your job is to (1) name the method, (2) say what it can and can't conclude, and (3) spot a design or ethical flaw. Naming the method correctly is the first step, because everything else depends on it.

Research Method vs Experimental Design

"Research method" is the umbrella category, and an experiment is just one method under it. Lots of students call every study an "experiment," but that's wrong on the exam. A study only counts as an experiment if the researcher manipulates an independent variable and randomly assigns participants to conditions. If the researcher only measures, surveys, or observes, it's a non-experimental method, and you can't claim cause and effect.

Key things to remember about Research Method

• A research method is the approach a psychologist uses to collect data, such as an experiment, correlational study, survey, case study, or naturalistic observation.

• Only an experiment with a manipulated independent variable and random assignment can support a cause-and-effect conclusion.

• Correlational and other non-experimental methods can show relationships or describe behavior, but they cannot prove causation.

• Science Practice 2 asks you to identify the research design (2.A), evaluate experimental and non-experimental design elements (2.B and 2.C), and judge ethical procedures (2.D).

• On the AAQ, such as the 2025 misinformation and memory study, correctly naming the research method is the foundation for answering the other parts.

• Ethical safeguards like debriefing and confidentiality matter most when a method uses deception or a confederate.

Frequently asked questions about Research Method

What is a research method in AP Psychology?

A research method is the specific approach used to gather data and test a hypothesis, like an experiment, correlational study, survey, case study, or naturalistic observation. It falls under Science Practice 2, which covers identifying and evaluating research designs.

Can a correlational study prove causation?

No. A correlational study only shows that two variables are related, because the researcher doesn't manipulate anything and a third variable could explain the link. Only an experiment with random assignment can support a causal claim.

What's the difference between a research method and an experiment?

An experiment is one type of research method, not a synonym for it. It's the only method where the researcher manipulates an independent variable and randomly assigns participants. Surveys, case studies, and correlational studies are research methods too, but they aren't experiments.

Is a case study an experiment?

No. A case study is a non-experimental method that examines one person or a small group in depth without manipulating variables. It gives rich detail, but its findings are hard to generalize to a larger population.

Are research methods on the AP Psych exam?

Yes, heavily. Research methods are the core of Science Practice 2, and the Article Analysis Question tests them directly. The 2025 and 2026 AAQ Q1 both used a six-part (A through F) format built around a research study.