IB Psychology SL Topic 6 — Answering Exam Questions Paper 2 Exam skill ~11 min read

Writing a Strong ERQ in Paper 2

One compulsory essay, fifteen marks, about a study you have never read before. It sounds like the least revisable question in the course. It is actually the most, because the same six concepts and the same research-methods thinking work on any study they can put in front of you.

📘 What you need to know

What the question looks like

You get a short account of a study — often a paragraph — and then an instruction of the form “discuss this study with reference to two or more of the following concepts”, with a list of three or four to choose from.

The only decision you have to make AN UNSEEN STUDY Bias Causality Change Measurement Perspective Responsibility choose two or more, then go deep the study is given, the concepts are learnable, so nothing here is a surprise your revision is the six concepts and your research methods knowledge
The exam question will normally offer you a shortlist of three or four concepts rather than all six. Read the list carefully before choosing.

Mining the study in five minutes

Read the study twice with a pen. Almost every concept has a physical home in a description of a method, and once you know where to look, they jump out.

ConceptWhere it hides in the studyWhat to say about it
BiasHow the sample was obtained; who was left out; how questions were wordedSampling bias, volunteer bias, demand characteristics, social desirability
CausalityWhether anything was manipulated; whether there was a control groupConfounding variables, correlation not causation, bidirectional ambiguity
ChangeTime span; before-and-after measures; whether an intervention was usedWhether change was real, lasting and caused by the intervention
MeasurementWhat the DV was and how it was recordedOperationalisation, self-report versus observed data, reliability and validity
PerspectiveWhich approach the explanation comes fromReductionism versus holism, alternative explanations, cultural bias
ResponsibilityConsent, deception, harm, vulnerable participants, how findings might be usedEthical standards, cost-benefit judgement, socially sensitive findings
Notice how much of that table is Topic 5. Section B is not really an essay question; it is a research methods evaluation with concept labels attached. If you know sampling, validity and ethics well, you already have most of the content.

Two concepts deep, or four concepts wide?

Depth or breadth: both can score, one is safer TWO CONCEPTS, DEEP safe, if the discussion is thorough FOUR CONCEPTS, WIDE only if you still show real depth the height of the bars is what gets marked, not the number of them two concepts fully argued beats four concepts mentioned
Under time pressure, two well-argued concepts is the safer bet. Add a third only if it genuinely has something new to say about the study.

Structuring the answer

🧩 A structure that fits any unseen study

  1. Introduction. One sentence summarising the study, then name the two concepts you will use and define them briefly.
  2. Concept one. Define, locate it in the study, evaluate what it does to the findings, link back.
  3. Concept two. Same shape.
  4. Interaction. One paragraph on how the two concepts affect each other in this study. This is where strong answers separate.
  5. Conclusion. A judgement: how far can we trust what this study claims, and why?

Worked examples

WORKED EXAMPLE

Mine an unseen study

A researcher recruited 45 people through a hospital noticeboard who had recently been diagnosed with a long-term illness. Over six months they took part in three interviews about how their sense of identity had shifted. The interviews were transcribed and analysed for themes by the researcher. Discuss this study with reference to two or more concepts. [15 marks]

Read for the sample Self-selecting from a noticeboard = bias, and a specific patient group limits transferability. Read for the measure Themes from interviews, coded by one person = measurement, plus credibility and reflexivity. Read for the time span Six months, three interviews = change, gradual and unplanned rather than an intervention. Read for the ethics Vulnerable participants and sensitive material = responsibility: consent, confidentiality, protection from harm. Choose bias and measurement, use change as the interaction four available concepts, two chosen — say in the introduction which two and why
WORKED EXAMPLE

Write the interaction paragraph

Using the same study, write the paragraph that links your two chosen concepts. [AO3]

Start from the overlap, not from either concept alone The sample and the measure are not independent problems here. Make the link People willing to volunteer for repeated interviews about identity are likely to be those most comfortable talking about it, so the themes that emerged may reflect who agreed to speak as much as what illness does to identity. Add the check that was missing A second researcher coding independently, or reflexive notes on the researcher’s own assumptions, would have strengthened credibility. Judge it So bias in the sample and subjectivity in the measurement compound each other rather than cancelling out. Two concepts, one argument this paragraph is what separates a competent answer from a strong one

💡 Exam tip

⚠️ Common mix-up

Up next: The Six Key Concepts Explained — the ideas that both ERQs are built on, and how to use them without turning them into content to memorise.

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