
IB Psychology Paper 3: What Do I Need To Know? The Short Answer
IB Psychology Paper 3 is only taken by HL students. You have 1 hour 45 minutes and the paper is worth 30 marks.
You are given a set of sources based around a psychological claim and answer four questions that test different skills:
- Question 1 [3 marks]: Explain an issue that limits the interpretation of data presented visually.
- Question 2 [6 marks]: Analyse quantitative findings and draw a conclusion.
- Question 3 [6 marks]: Discuss a research consideration in relation to qualitative research.
- Question 4 [15 marks]: Evaluate a claim using your own psychological knowledge and evidence from the sources.
You do not need to know the research in advance. The key is being able to interpret evidence, apply your research methods knowledge and think critically about what the evidence allows us to conclude.
IB Psychology Paper 3: What Do I Need To Know? The Long Answer
Paper 3 is different from Papers 1 and 2 because much of the information you need is provided for you in the exam.
You will be given several sources linked to a psychological claim. These can include graphs, tables, quantitative studies and qualitative research.
Your job is not simply to describe what the sources say. You need to interpret, analyse and evaluate the evidence and decide what conclusions can reasonably be drawn from it.
Question 1: Interpreting Data [3 marks]
The first question gives you data presented visually and asks you to explain one issue that limits its interpretation.
This could involve something about the graph itself or information that is missing and therefore makes the findings difficult to interpret.
For example, you might consider:
- labels, titles and scales
- how variables have been measured or defined
- missing information about the sample
- whether the way the data are presented could be misleading
- whether important information is needed before conclusions can be drawn
The important word here is explain. For 3 marks, you need to do more than spot a problem. You need to explain why it limits the interpretation of the data.
The markscheme moves from identifying a relevant issue at 1 mark, to describing it at 2 marks, to explaining it at 3 marks.
Question 2: Analysing Quantitative Data [6 marks]
Question 2 asks you to analyse findings and state a conclusion linked to the overall claim.
This means you need to be comfortable interpreting quantitative data.
Depending on the source, you might consider:
- mean and median
- range and standard deviation
- patterns and differences between groups
- distributions of data
- correlations
- information presented in graphs or box-and-whisker plots
Don't just list numbers. Use the data as evidence for what you are saying.
Then draw a conclusion that answers the question and is explicitly supported by the findings.
For the highest markband, the data need to be analysed in detail, with a conclusion explicitly linked to the findings.
Question 3: Evaluating Qualitative Research [6 marks]
Question 3 focuses on a research consideration in relation to qualitative research. You could be asked about credibility, avoiding bias or transferability.
In the specimen paper, students are given a focus-group study and asked how the researcher could improve the credibility of the findings. However, your question could focus on any of the three research considerations.
Depending on the question, you might think about:
- Credibility: how confidence in the findings could be increased, for example through triangulation, member checking or peer review.
- Avoiding bias: how the influence of the researcher or other sources of bias could be recognised and reduced, for example through reflexivity, researcher triangulation or checking interpretations.
- Transferability: whether and how the findings might apply to other people, groups or contexts, considering the sample, setting and cultural context of the research.
Again, application matters. Don't simply explain what credibility, avoiding bias or transferability means. Use details from the source to explain how the research consideration applies to that particular study and why it matters for the findings.
For 5–6 marks, you need detailed understanding of the research consideration and explicit reference to relevant evidence from the source.
Question 4: Evaluating the Claim [15 marks]
Question 4 brings everything together.
You are given a claim and asked to what extent the available evidence allows you to support it.
You must use:
- your own psychological knowledge
- at least three of the sources
- different points of view
- critical analysis
- a reasoned conclusion.
This is not simply a long summary of the sources.
Instead, think of yourself as building an argument.
What evidence supports the claim?
What evidence challenges or qualifies it?
How strong is that evidence?
What does your own psychological knowledge add to the argument?
Overall, to what extent is the claim justified?
Your own knowledge could include relevant psychological theories, research, concepts or methodological knowledge that helps you interpret and evaluate the claim.
For the highest markband, you need detailed and well-developed knowledge, critical analysis, effective use of at least three sources, evaluation of different points of view and a clearly reasoned conclusion.
What Should I Revise For Paper 3?
Paper 3 is not a paper you can prepare for simply by memorising content.
Instead, practise the skills you will need to apply to unfamiliar sources.
Make sure you can:
- identify problems with graphs and other visual representations of data
- interpret measures of central tendency and dispersion
- analyse patterns, differences and relationships in quantitative data
- draw conclusions that are supported by evidence
- understand considerations involved in qualitative research
- use evidence from sources rather than simply describing it
- evaluate the strength of evidence
- bring several sources together to construct an argument
- use your own psychological knowledge to support or challenge a claim
- reach a reasoned conclusion.
My Biggest Paper 3 Tip
Use the sources as evidence, not as something to summarise.
It is not enough to tell the examiner what a graph, table or study shows. Ask yourself:
What does this evidence allow me to conclude, and what doesn't it allow me to conclude?
That shift from describing evidence to evaluating what the evidence means is at the heart of Paper 3.
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