---
title: "Confederate — AP Psychology Definition & Examples"
description: "A confederate is a research assistant secretly acting as a participant to stage a scenario. Key to Asch, Milgram, and bystander studies on the AP Psych exam."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/confederate"
type: "key-term"
subject: "AP Psychology"
unit: "Unit 0"
---

# Confederate — AP Psychology Definition & Examples

## Definition

In AP Psychology, a confederate is a research assistant who secretly works for the experimenter while pretending to be a regular participant, acting out a scripted role to create a realistic situation, like the fake "participants" giving wrong answers in Asch's conformity study.

## What It Is

A confederate is an actor planted inside a study. They look like just another participant, but they're actually following the researcher's script. Their job is to make a staged situation feel real so the actual participants react naturally instead of performing for the experimenter.

Confederates show up constantly in the classic social psychology studies you'll see on the exam. In Asch's [conformity](/ap-psych-revised/key-terms/conformity "fv-autolink") experiments, the confederates were the people deliberately giving wrong answers about line lengths. In Milgram's [obedience](/ap-psych-revised/key-terms/obedience "fv-autolink") study, the "learner" screaming from the other room was a confederate (nobody was actually shocked). In bystander effect research, confederates fake emergencies or sit calmly while smoke fills the room. Without confederates, none of those situations could be controlled and repeated the same way for every participant, which is exactly what makes them experiments rather than just observations.

## Why It Matters

This term lives in Topic 0.1, Science Practice 1 (Concept Application), where you apply research methods vocabulary to actual study descriptions. On the exam, you'll read a scenario and need to recognize who's a real participant and who's part of the experimental setup, because that distinction changes how you interpret the results. Confederates also connect directly to research ethics. Using confederates almost always means using [deception](/ap-psych-revised/key-terms/deception "fv-autolink"), which is why studies like Milgram's require [debriefing](/ap-psych-revised/key-terms/debriefing "fv-autolink") afterward and why they get scrutinized by review boards. If you can spot the confederate in a study description, you can usually also explain what was being manipulated and why deception was necessary.

## Connections

### Asch's conformity study (Unit 4)

The cleanest example of confederates in action. Asch surrounded one real participant with confederates who all gave the same obviously wrong answer, and about a third of the time the real participant conformed. The confederates ARE the [independent variable](/ap-psych-revised/key-terms/independent-variable "fv-autolink") here, since the group pressure they create is what's being manipulated.

### Milgram's obedience study (Unit 4)

Milgram's "learner" was a confederate whose recorded protests made participants believe they were delivering real shocks. This is also your go-to example for the ethics of deception, because participants experienced real [distress](/ap-psych-revised/key-terms/distress "fv-autolink") over fake harm.

### Bystander effect and helping behavior (Unit 4)

Researchers studying when people help in emergencies use confederates to stage the emergency itself, like a person collapsing or staying passive while smoke pours into a room. The 2025 EBQ asked you to build an argument about social conditions that make helping more likely, and the source studies behind that question depend on confederate-staged scenarios.

### Research ethics and debriefing (Unit 0)

Confederates only work if participants are deceived, so any study using them must include [informed consent](/ap-psych-revised/key-terms/informed-consent "fv-autolink") (as much as possible) and a full debriefing where the deception is revealed. Tie these together and you've got a ready-made FRQ answer about why deception can be ethically justified.

## On the AP Exam

You won't get a question that just asks "define confederate." Instead, multiple-choice stems describe a study scenario and you have to identify the confederate's role, usually to figure out what's being manipulated or whether deception was involved. On the Evidence-Based Question, source studies frequently use confederates. The 2025 EBQ Q2 asked you to argue about social conditions that make people more likely to help in an emergency, and bystander research like that is built on confederates staging emergencies. When you summarize a source study, correctly distinguishing confederates from real participants shows you actually understand the method, and confusing them can wreck your explanation of the results.

## Confederate vs Participant

A participant is the person actually being studied, and their behavior is the data. A confederate just pretends to be a participant while following the researcher's script, so nothing they do counts as data. In Asch's study, the one naive person was the participant; the seven people giving wrong answers were confederates. If you mix these up on an FRQ, your whole explanation of the study's results falls apart.

## Key Takeaways

- A confederate is an actor working for the researcher who pretends to be a regular participant in order to stage a realistic, controlled scenario.
- A confederate's behavior is scripted and is never counted as data; only the real participants' reactions are measured.
- Confederates power the classic social psych studies you need to know, including Asch's conformity lines, Milgram's shocked "learner," and bystander effect emergencies.
- Using confederates means using deception, which is why these studies require debriefing participants afterward to stay ethical.
- On the exam, your job is to read a study description and correctly identify who is a confederate versus a real participant, then explain what that setup manipulates.
- In AP Psychology, "confederate" has nothing to do with the Civil War; it means an accomplice in an experiment.

## FAQs

### What is a confederate in AP Psychology?

A confederate is a research assistant who secretly works for the experimenter while posing as a regular participant, acting out a scripted role to create a realistic situation. The fake "participants" giving wrong answers in Asch's conformity study are the classic example.

### Is a confederate's behavior part of the study's results?

No. Confederates follow a script, so their behavior is part of the experimental setup, not the data. Only the real participants' responses get measured and analyzed.

### What's the difference between a confederate and a participant?

The participant is the person being studied; the confederate is an actor creating the situation the participant reacts to. In Milgram's obedience study, the person pressing the shock switches was the participant, and the "learner" pretending to be shocked was a confederate.

### Why do researchers use confederates if it means deceiving people?

Because people behave differently when they know they're being watched or know the situation is fake. Confederates let researchers stage the exact same realistic scenario for every participant, and the deception is addressed through debriefing after the study ends.

### Which famous psychology studies used confederates?

Asch's conformity study (confederates gave wrong answers about line lengths), Milgram's obedience study (the "learner" was a confederate), and Darley and Latané's bystander effect research (confederates staged emergencies or stayed passive). All three are core [Unit 4](/ap-psych-revised/unit-4 "fv-autolink") social psychology content.

## Related Study Guides

- [Science Practice 1 – Concept Application](/ap-psych-revised/unit-0/1-science-practice-concept-application/study-guide/hgfXaWPEvBwMLPmC)

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