The IB Psychology internal assessment is a core part of your course where you conduct an already published research study within psychology. It allows you to move beyond theory and actively test a psychological concept through investigation. You plan the study, select participants, organise materials, collect data, and evaluate the results.
You usually work in a small group of two to four learners to design the research method and manage practical elements. However, each of you must submit an individual report with your own analysis, discussion, and conclusion.
Your final write-up is typically between 1,800 and 2,200 words, including citations (excluding appendices). In terms of weighting, the IA contributes around 25–30% of the final grade at Standard Level and about 20% at Higher Level, making it an important component of your overall performance.
The IB Psychology IA measures how effectively you apply psychological theory and research methods in your own practical investigation. It examines your ability to think critically, use accurate psychological terminology, and evaluate your findings against academic standards. When you review an IB Psychology IA example, you begin to see how theory, method, and reflection come together in a structured and well-supported report.
Understanding how your IA is assessed helps you prepare well for it. The task is divided across four criteria. When you plan carefully and address each area clearly, you strengthen your overall performance.
| Criterion | Marks | What You Must Focus On |
| Introduction | 6 | State the aim clearly; explain what you are investigating and why it matters in psychology. |
| Exploration | 4 | Justify your research design; explain the sampling method and participant choice. |
| Analysis | 6 | Present descriptive statistics (mean, median, range, standard deviation); apply suitable inferential tests. |
| Evaluation | 6 | Link findings to theory; discuss key strengths and limitations of design and procedure. |
When you understand the above criteria clearly, you begin to see what examiners actually look for in a strong report.
You should now explore IB Psychology internal assessment examples and topic ideas, so you can visualise how these criteria work in your IA task.
Before you finalise your idea, it helps to see how other learners structure their work. Here are a few examples that show how a clear aim, defined variables, and careful design come together in a strong IA. Some examples of Psychology IA are mentioned below for your understanding.
| Psychology IA IB Examples | Research Design | What You Examine | Key Considerations |
| How does the primacy effect influence the recall of items in a list? | Controlled experiment | Recall of words from different positions in a list | Randomise word lists; control distractions. |
| Does the Stroop effect influence reaction time in colour-word tasks? | Repeated measures experiment | Difference in reaction time between congruent and incongruent words | Standardise word sets; control testing conditions. |
| Do specific scents enhance memory recall? | Experimental (multiple scent conditions) | Accuracy of recall under different scent conditions | Use neutral scents; standardise study material. |
| Does listening to classical music improve students' concentration during study time? | Repeated measures experiment | The difference in comprehension scores between the silent and music conditions | Keep text difficulty and study time consistent across conditions. |
Choosing the right topic is your first strategic step. You need a concept that is researchable, manageable within school settings, and directly linked to psychological theory. Avoid topics that are too broad or ethically sensitive.
Here are focused topic ideas you can consider:
| Area of Psychology | Topic Idea | What You Could Investigate |
| Cognitive | The effect of anchoring bias in the context of solving a mathematical equation | How initial numerical anchors influence estimation accuracy |
| Cognitive | Recreation of the study of Strack and Mussweiler (1997): The effect of Anchoring Bias on decision-making | Whether high vs low anchors affect judgment outcomes |
| Cognitive | An investigation into the effect of anchoring bias on judgment and decision-making | Differences in decisions when exposed to varying anchor values |
| Cognitive | An experiment investigating the influence of leading questions and post-event information on witnesses’ answers | Change in memory recall accuracy due to a change in wording |
| Cognitive | An Investigation on Schema Theory: Visual Representation on Memory Recall (Bransford & Johnson, 1972) | How prior context influences comprehension and recall |
The IB Psychology IA challenges you to think and work like a psychologist. You plan a structured investigation, analyse data carefully, and evaluate findings with clarity and balance. When you address the introduction, exploration, analysis, and evaluation criteria thoughtfully and apply psychological theory accurately, your report looks impressive.
The quality of guidance and the academic environment also contribute significantly to tasks such as IB IA. Schools that offer well-structured IB programmes, such as JAIN International Residential School (JIRS), provide the academic support and mentoring that help you handle demanding assessments like the IB Psychology IA with greater clarity and confidence.
A1: The IB Psychology IA is an internal assessment where you conduct an original psychological investigation. You design the study in a small group, but submit an individual report that includes your own analysis, discussion, and evaluation.
A2: Your report should typically be between 1,800 and 2,200 words. Staying within this range helps you present your research clearly while meeting IB expectations.
A3: The IA is marked out of 22 marks across four criteria: Introduction, Exploration, Analysis, and Evaluation. Each section contributes directly to your overall score.
A4: The IA carries significant weight. It contributes around 25–30% of the final grade at Standard Level and about 20% at Higher Level, making it a key component of your overall performance.
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