Cambridge IAL · Exam Tips

Psychology (9990) Exam Tips

Master Cambridge A Level Psychology (9990) with examiner-backed insights. Learn how to contextualise research methods, bridge the gap between raw data and conclusions, secure full marks on 10-mark planning items, and avoid critical caps on evaluation essays.

3 min readUpdated: 21 Jun 2026

Exam at a Glance

Papers
4
Total Marks
240
Time Limit
6h
Question Types
5
PaperDurationMarksQuestionsWeightingQuestion Types
Paper 1 Approaches, Issues and Debates1h 30min601025%Short Answer (Recall/Outline), Essay / Evaluation (AO3)
Paper 2 Research Methods1h 30min601125%Methodological short answers, Planning and Evaluation essay
Paper 3 Specialist Options1h 30min60825%Structured Application & Methodological, Essay / Evaluation (AO3)
Paper 4 Specialist Options: Application1h 30min60525%Short Answer (Recall/Outline), Planning & Design (AO2)
Grade Scale
A*ABCDEU
Calculator Policy

A silent scientific calculator is required where the syllabus permits one. It must NOT be graphical, programmable, or capable of symbolic algebra (CAS), and it must contain no stored programs or notes.

Built from real past papers and marking schemes (2023–2025).

Tips & Strategies

The 5-Minute Habit That Saves a Whole Grade Band

Many candidates lose points not because they lack psychological knowledge, but because they dive straight into writing without dissecting the question. In Cambridge A Level Psychology, five minutes of careful planning on high-mark questions can elevate your response from a Level 2 to a Level 5. Before putting pen to paper, actively underline the command words (such as describe, evaluate, or explain) and identify any explicitly named issues or scenarios. This discipline ensures you address every facet of the prompt instead of drifting into irrelevant descriptions.

Where the Marks Really Hide: The Art of Contextualisation

The single most common complaint among Cambridge examiners is the lack of contextualisation in evaluation and methodology questions. Candidates frequently write generic statements such as, "Case studies lack generalisability because they only study one person." While true, this response earns minimal credit because it is not applied. To secure top-tier marks, you must link your points directly to the core studies or scenarios provided. For example, instead of a generic critique of phobia treatments, explain exactly how systematic desensitisation applies to Habiba's fear of flying insects by referencing her anxiety hierarchy—moving from looking at a picture of a fly to hearing a quiet buzzing sound, and finally having a wasp land near her.

Don't Just List Numbers: Bridging Results and Conclusions

Another frequent pitfall is confusing results with conclusions. A result is the raw numerical data or percentage found in a study (e.g., stating that 26 out of 40 participants pressed the maximum 450-volt switch in Milgram's obedience study). A conclusion is the generalized, conceptual meaning behind those numbers (e.g., "Individuals will violate their personal moral codes to obey an authority figure in a structured setting"). If a question asks for a conclusion, providing raw statistics will cost you marks. Always ask yourself: What do these numbers actually reveal about human behavior?

The Secret to Navigating 10-Mark Planning Questions

When Paper 2 or Paper 4 asks you to design a study, you are being assessed on your ability to think like a professional researcher. Top-scoring designs must be highly operationalised and sufficient for replication. Focus on these four pillars:

  • Format: State precisely whether your questionnaire uses paper and pencil, an online portal, or is conducted face-to-face.
  • Examples: Provide at least two actual, original question items that you would use in your investigation.
  • Scoring: Specify the rating scale (e.g., a 1-to-5 Likert scale) and explicitly define what the high and low anchors represent.
  • Sampling Technique: Describe how you will recruit participants (e.g., opportunity, volunteer, or random sampling) without using circular definitions.

Crucially, do not design an experiment if the prompt asks for an observation or interview. Treating non-experimental designs as experiments by introducing independent and dependent variables is a critical error that limits your mark.

Cracking the Code of the Named Issue in Evaluation Essays

In Paper 3 and Paper 4, the 10-mark evaluation essays are structured around a named issue (such as reductionism vs. holism, nature vs. nurture, or quantitative vs. qualitative data). If you write a brilliant essay but ignore this named issue, your mark is automatically capped at a Level 3. Make sure to structure your response with dedicated, balanced paragraphs evaluating the core theories or treatments through the specific lens of that issue. For example, when evaluating MAOI antidepressants and Ellis's REBT, discuss how both treatments are reductionist because they target isolated components of depression (neurotransmitters versus cognitive distortions) rather than addressing the patient's entire lifestyle and environment.

What Top Scorers Do Differently: Active Recall and Positive Marking

Top scorers understand that Cambridge uses positive marking. Examiners look for opportunities to reward you; they do not deduct marks for incorrect details. Therefore, leaving a question completely blank is the worst mistake you can make. Always write something, even if you can only outline a basic psychological assumption or describe one part of a study's procedure. To build a robust memory for the 32 core studies, use active recall to test yourself on key details such as sample characteristics, numerical results, and ethical guidelines, rather than passively highlighting your textbook.

Calculator Programmes

Table mode for roots & turning points

Scientific calculator (e.g. Casio fx-991 series)

Purpose: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.

When to use it: Solving or sketching a function when you want to find where its graph crosses or turns.

Steps
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.

Exam note: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.

Statistics mode (mean, SD & regression)

Scientific calculator (e.g. Casio fx-991 series)

Purpose: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.

When to use it: Any data-handling, statistics, or required-practical analysis question.

Steps
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.

Exam note: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.

Carry exact values with Ans & memory

Scientific calculator (e.g. Casio fx-991 series)

Purpose: Keep full-precision intermediate values to avoid rounding errors.

When to use it: Multi-step calculations where premature rounding loses the final accuracy mark.

Steps
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.

Exam note: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.

Equation solver — to CHECK your working

Scientific calculator (e.g. Casio fx-991 series)

Purpose: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.

When to use it: As a check only, after solving by hand.

Steps
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.

Exam note: Allowed, but the calculator must be silent, non-graphical, non-programmable and free of stored content; always show the working the mark scheme requires.

Common Mistakes

  1. 1highMarks at stake: 2Research Methods

    Defining psychological terms using circular logic or repeating the target word within the definition.

    How to avoid it: Use distinct technical vocabulary. Instead of saying 'random sampling is selecting participants at random,' define it as 'a sampling technique where every member of the target population has an equal chance of being selected, using a random generator or draw system.'
  2. 2highMarks at stake: 2Approaches, Issues and Debates

    Presenting numerical results or raw statistical data when specifically asked to outline conclusions.

    How to avoid it: Outline the general psychological meaning behind the findings. Do not just quote numbers (e.g. '82% of participants helped'). Instead, write: 'In a natural setting, people are more likely to offer spontaneous help to an ill victim than a drunk victim.'
  3. 3highMarks at stake: 4Evaluation (AO3)

    Failing to contextualise general strengths and weaknesses of research designs to the specific core studies.

    How to avoid it: Avoid abstract statements like 'case studies lack generalisability.' Always link the point back to the study context: 'The case study of the 9-year-old boy by Saavedra and Silverman lacks generalisability because his phobia was triggered by a highly unique event (a bowl of buttons falling on him).'
  4. 4mediumMarks at stake: 6Specialist Options

    Omiting or under-evaluating the 'named issue' in the 10-mark Section B/C evaluation questions.

    How to avoid it: Check the prompt for the named issue (e.g. reductionism vs holism) and dedicate a balanced, detailed section evaluating the treatments or theories under that specific framework to avoid a capped mark.
  5. 5mediumMarks at stake: 10Planning and Design

    Designing an experimental laboratory study when the question explicitly commands a non-experimental method (e.g. observation or interview).

    How to avoid it: Carefully read the question stem and identify the required methodology. If asked to design a study using a questionnaire or observation, do not introduce independent and dependent variables.
  6. 6highMarks at stake: 4Exam Strategy

    Leaving challenging short-answer questions completely blank.

    How to avoid it: Write down an educated guess or related psychological concept. Cambridge uses positive marking, meaning incorrect answers are not penalised, and any attempt has the chance to secure partial marks.

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