How A-Level Psychology is Assessed: The 12 Core Studies and Research Methods in Cambridge 9990 are Key
Based on the official syllabus for Cambridge International 9990 Psychology, this guide explains the structure, duration, marks, and weighting of the four papers (Approaches, Issues and Debates; Research Methods; and two Applied papers). It covers the four approaches and 12 mandatory core studies at AS Level along with the required depth of understanding, the selection of two out of four A Level applications (Clinical, Consumer, Health, and Organizational), minor changes starting in 2028, and preparation strategies for core studies, research design, evaluation, and terminology.
In China, A-Level Psychology primarily follows the Cambridge International 9990 syllabus. A quick note: we could not find an IAL Psychology course page on the Pearson Edexcel website, so this article focuses exclusively on Cambridge 9990.
The core of this course is the 12 mandatory "core studies" and research methods: it's not just about memorizing psychological conclusions, but also being able to explain how each study was conducted, what ethical issues are involved, and what its strengths and weaknesses are. Based on the official Cambridge syllabus, this article breaks down how the exams are structured and how to prepare. For a comparison with AP Psychology, check out our guide on How AP Psychology is Tested; for general A-Level rules, see How to Get an A* in A-Level.
1. Four Papers, All Mandatory
| Paper | Structure | Time / Marks | AS Weighting | A Level Weighting |
|---|---|---|---|---|
| Paper 1 Approaches, Issues and Debates | A: Short-answer questions based on core studies (38 marks) B: Extended responses and essays based on core studies (22 marks) | 1 hr 30 min / 60 marks | 50% | 25% |
| Paper 2 Research Methods | A: Short-answer and scenario-based questions (46 marks) B: A multi-part research design question (14 marks) | 1 hr 30 min / 60 marks | 50% | 25% |
| Paper 3 Options: Approaches, Issues and Debates | Answer questions from two options, 30 marks each | 1 hr 30 min / 60 marks | — | 25% |
| Paper 4 Options: Applications and Research Methods | A: Questions from two options, 18 marks each B: A multi-part research design question (24 marks) | 1 hr 30 min / 60 marks | — | 25% |
AS covers Papers 1 and 2; the full A Level requires all four papers (which can be taken over two years: AS in the first year, and Papers 3 and 4 in the second year).
Assessment Objectives
| Objective | AS | A Level |
|---|---|---|
| AO1 Knowledge and Understanding | 35% | 30% |
| AO2 Application | 35% | 35% |
| AO3 Analysis and Evaluation | 30% | 35% |
2. AS: Four Approaches, 12 Core Studies
AS covers four psychological approaches: biological, cognitive, learning, and social. The 12 mandatory core studies are distributed across these four approaches (for example, the biological approach includes Dement and Kleitman's study on sleep and dreams). The official syllabus requires students to master the following for each study:
- The psychological theme and context of the study;
- The aim of the study;
- The procedure: research method, sample and sampling, experimental design, controls, data collection methods, independent and dependent variables, etc.;
- Ethical issues;
- Results (key quantitative and qualitative findings) and conclusions;
- The strengths and weaknesses of various aspects of the study.
Students must also be able to describe and evaluate research methods, and link the studies to psychological issues and debates. The core studies cover a variety of methods, including experiments, self-reports, case studies, observations, correlations, and longitudinal studies.
3. A Level: Choose Two Out of Four Options
| Option | Content |
|---|---|
| Clinical Psychology | Diagnostic criteria, symptoms, explanations, and treatments for various psychological and behavioral disorders (e.g., schizophrenia, mood disorders, impulse control disorders) |
| Consumer Psychology | Consumers and businesses, and the design of consumption environments (e.g., store design, sound and consumer behavior, menu design, consumer decision-making) |
| Health Psychology | Psychological factors affecting health, measurement and management of pain and stress, and health behaviors |
| Organizational Psychology | Individuals and groups in the workplace and organizations |
The official syllabus states that the four options are balanced and equivalent in content volume and difficulty. Each option specifies several key studies.
4. Minor Changes from 2028 Onwards
The new syllabus for 2028–2030 was released in September 2025. The official statement notes that these are only very minor changes made for clarity. For example, in the A Level Issues and Debates section, "generalisations from findings" has been changed to "generalisations"; specific related issues have been removed from certain subsections (e.g., "use of children in research" removed from 1.1.1); and some subsection titles have been adjusted (e.g., 3.4.3 changed from "Managing stress" to "Preventing and managing stress"). Approved textbooks published after 2024 remain applicable.
5. How to Prepare
Here are some practical, experience-based tips.
- Make flashcards for core studies: Organize each study according to the official requirements (aim, method, sample, procedure, ethics, results, conclusions, strengths and weaknesses). The short-answer questions in Paper 1 basically ask for these points one by one;
- Be able to "apply" research methods: Papers 2 and 4 both include research design questions. You need to be able to write out hypotheses, variables, sampling methods, procedures, ethical considerations, and data collection methods for a given scenario;
- Be specific in evaluations: Don't just write "the sample is too small." Explain why a small sample affects the generalizability of the study's conclusions;
- Choose your options early: A Level only requires two options. Work with your teacher to decide early based on your interests and future major;
- Master English terminology: Terms like ecological validity, demand characteristics, operationalisation, counterbalancing, and informed consent should be organized by research method and core study.
Final Thoughts
The key to A-Level Psychology is to thoroughly master the 12 core studies and practice research methods until you can design them yourself. Then, dive deep into two options for A Level. All four papers are 1.5 hours and 60 marks, with a steady pace. Systematic preparation according to the official assessment dimensions will help you score high.
If you need tutoring for A-Level Psychology, feel free to chat with our teachers.
Verification note: This article was verified against official materials in September 2026. The four papers, structure, time, marks, weightings, exam routes, three assessment objectives and their weightings, four approaches, 12 core studies and their mastery requirements, and four options with content for Cambridge 9990 are sourced from the Cambridge International AS & A Level Psychology 9990 syllabus for examination in 2027. The changes in the 2028–2030 syllabus are sourced from the 2028–2030 syllabus (released in September 2025). The Pearson Edexcel website's IAL Psychology page URL returned "page not found" at the time of our verification. Examples in the options content are from the syllabus table of contents; the preparation tips are our experience-based suggestions.
References: