Psychology · Year 11 · Research Methods · 5.º Período

Sampling and Ethics

An examination of different sampling techniques and the ethical guidelines set by the British Psychological Society (BPS). Students will evaluate the importance of informed consent and debriefing.

TL;DR:Sampling and ethics are the 'rules of engagement' for psychologists. Students learn how to select participants using techniques like random, opportunity, and systematic sampling, evaluating the bias and generalisability of each. They also study the British Psychological Society (BPS) ethical guidelines, focusing on informed consent, deception, protection from harm, and debriefing.

• National Curriculum Attainment Targets
• AQA GCSE Psychology 3.2.2.3 Sampling methods
• AQA GCSE Psychology 3.2.2.4 Ethical considerations

About This Topic

Sampling and ethics are the 'rules of engagement' for psychologists. Students learn how to select participants using techniques like random, opportunity, and systematic sampling, evaluating the bias and generalisability of each. They also study the British Psychological Society (BPS) ethical guidelines, focusing on informed consent, deception, protection from harm, and debriefing.

This topic is vital for developing students' critical thinking. It asks them to consider not just *what* we can learn, but *how* we should treat people in the process. This is a great area for student-centered learning because ethical dilemmas are rarely black and white. By debating real-world case studies and 'sampling' their own classmates, students learn the practical difficulties of conducting ethical, representative research.

Key Questions

1. How do researchers select a representative sample?
2. What are the BPS ethical guidelines?
3. Why is deception sometimes used in research?

Watch Out for These Misconceptions

Common Misconception

Opportunity sampling is the best because it's the easiest.

What to Teach Instead

While easy, it is often the most biased because it only includes people who happen to be available. A 'sampling bias' activity where students see how the front row differs from the back row helps them understand why random sampling is usually preferred.

Common Misconception

Deception is never allowed in psychology.

What to Teach Instead

Deception is sometimes necessary to avoid 'demand characteristics', but it must be justified and followed by a full debrief. A structured debate on 'the right to know' vs 'the need for science' helps students see the nuance in ethical decisions.

Active Learning Ideas

Simulation Game

The Sampling Challenge

The teacher wants to know the class's favourite film. Students must try to get an answer using different sampling methods: opportunity (just the front row), random (names out of a hat), and systematic (every 3rd person). They then compare how 'representative' each result is.

30 min·Whole Class

Mock Trial

The Ethics Committee

Students are given a controversial study proposal (e.g., a new version of the Milgram study). One group acts as the researchers defending the study, while the other acts as the BPS Ethics Committee, using the guidelines to decide if it can go ahead.

45 min·Small Groups

Think-Pair-Share

The Debriefing Script

Students are given a scenario where participants were slightly deceived (e.g., told it was a memory test when it was actually about conformity). In pairs, they must write a 'debriefing script' that follows all BPS guidelines.

20 min·Pairs

Frequently Asked Questions

What is the most representative sampling method?

Random sampling is generally considered the most representative because every member of the target population has an equal chance of being chosen, which reduces researcher bias.

Why is 'informed consent' so important?

Informed consent ensures that participants know exactly what they are getting into before they agree to take part. It respects their autonomy and protects them from being forced into something they might find distressing.

What are the BPS ethical guidelines?

The British Psychological Society (BPS) provides a code of conduct that all UK psychologists must follow. It covers four main principles: Respect, Competence, Responsibility, and Integrity.

How can active learning help students understand sampling and ethics?

Active learning turns ethical guidelines from a list of rules into a set of living dilemmas. When students have to 'defend' a study to an ethics committee or 'sample' their peers, they see the real-world trade-offs between scientific accuracy and participant welfare. This makes the AQA evaluation points much easier to remember and apply in an exam context.