Essay Technique & Evaluation Skills

Essay questions carry the most marks on AQA A-Level Psychology papers. A 16-mark essay is worth one-sixth of an entire paper. Mastering essay technique — particularly evaluation — is the single most effective way to improve your grade. This lesson covers essay structure, the PEEL method for evaluation, application technique, integrating Issues and Debates, and common mistakes to avoid.

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Types of Extended Writing Questions

AQA uses two main types of extended writing question:

Type	Marks	Typical Command	AO1	AO3
12-mark essay	12	"Outline and evaluate..."	6	6
16-mark essay	16	"Discuss..."	6	10

Some 16-mark essays on Paper 3 also include a scenario and carry AO2 (application) marks in addition to AO1 and AO3. Always read the question carefully to check whether a scenario is included.

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Structuring AO1 (Description): The 6-Mark Rule

Both 12-mark and 16-mark essays award a maximum of 6 marks for AO1 (description). This is a crucial insight because it means:

• You should not spend more than one-third of your time on description.
• Your description should be concise, accurate, and detailed — not lengthy and vague.
• Cover the key features of the theory, study, or explanation in a clear and organised way.
• Use specialist terminology accurately (e.g. "operant conditioning", "episodic memory", "insecure-avoidant attachment").

How to Write Effective AO1

1. Start with a clear definition or overview of the theory/explanation being discussed.
2. Identify the key components (e.g. for the multi-store model: sensory register, short-term memory, long-term memory, encoding differences, capacity, duration).
3. Use specific details — names of researchers, dates, key findings, specific terminology.
4. Be selective — do not describe everything you know. Choose the most relevant and important points.
5. Keep it concise — aim for one to two paragraphs of description (roughly 100-150 words for a 12-mark essay, 100-150 words for a 16-mark essay).

Common Mistake: Many students write three paragraphs of description and one paragraph of evaluation. This produces an imbalanced essay that scores highly on AO1 but poorly on AO3. Since AO3 carries more marks (especially in 16-mark essays), this approach severely limits your grade.

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Structuring AO3 (Evaluation): The PEEL Method

Evaluation is where the majority of marks are awarded, particularly in 16-mark essays (10 out of 16 marks). The most effective way to structure evaluation points is the PEEL method.

PEEL Structure

Step	Meaning	Example
P — Point	Make a clear evaluative point	"A strength of the cognitive approach is that it has practical applications."
E — Evidence	Support the point with research evidence	"For example, Beck's cognitive triad and Ellis's ABC model led to the development of CBT."
E — Explain	Explain why this evidence supports or undermines the theory	"This is a strength because CBT has been shown to be effective for treating depression (NICE, 2022), demonstrating that the cognitive approach's emphasis on faulty thinking has real-world value."
L — Link	Link back to the question or make a concluding statement	"Therefore, the cognitive approach can be considered a useful approach because it has led to effective, evidence-based treatments."

Example of a Full PEEL Evaluation Paragraph

Point: A limitation of the behaviourist approach is that it is environmentally deterministic.

Evidence: The approach argues that all behaviour is shaped by conditioning (classical and operant) and that internal mental states play no role. Skinner (1971) explicitly argued that free will is an illusion and that behaviour is entirely determined by reinforcement contingencies.

Explain: This is problematic because it ignores the well-documented role of cognitive factors in behaviour. For example, Bandura's research on self-efficacy (1977) demonstrates that people's beliefs about their own abilities influence whether they persist with tasks — a finding that cannot be explained by stimulus-response associations alone. Furthermore, the concept of environmental determinism is challenged by humanistic psychologists such as Rogers, who emphasise personal agency and free will.

Link: This suggests that the behaviourist approach provides an incomplete account of behaviour because it fails to acknowledge the influence of cognitive and personal factors.

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How Many Evaluation Points?

The number of evaluation points depends on the essay type:

Essay Type	AO3 Marks	Recommended Number of Points
12-mark	6	3 well-developed PEEL paragraphs
16-mark	10	4-5 well-developed PEEL paragraphs

It is better to have fewer, well-developed evaluation points than many superficial ones. A common mistake is to list six or seven evaluation points with one sentence each — this scores poorly because the points lack elaboration and evidence.

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Types of Evaluation Points

There are many different ways to evaluate a theory or study. Using a variety of evaluation types demonstrates breadth and sophistication.

1. Supporting Research Evidence

Cite a study that supports the theory or explanation.

• Name the researcher(s) and date.
• Briefly describe the key findings.
• Explain how these findings support the theory.
• Consider the methodology of the supporting study (is it reliable? valid? generalisable?).

2. Contradicting Research Evidence

Cite a study that challenges the theory or explanation.

• Name the researcher(s) and date.
• Briefly describe the key findings.
• Explain how these findings undermine the theory.
• Consider whether the contradicting study itself has limitations.

3. Methodological Issues

Evaluate the research methods used in key studies.

Issue	Description	Example
Lab experiment	High control but low ecological validity	Milgram's obedience study was conducted in an artificial setting; participants may not behave the same way in real life
Field experiment	More ecological validity but less control	Hofling et al.'s (1966) nurse study had high ecological validity but ethical concerns
Sample bias	Unrepresentative sample limits generalisability	Milgram's sample was all male, all American — findings may not generalise to women or other cultures
Demand characteristics	Participants may guess the aim and alter behaviour	Orne (1962) argued that participants in psychology experiments behave differently because they know they are being studied
Social desirability bias	Participants may give socially acceptable answers	Self-report measures of prejudice may underestimate true levels of prejudice
Ethical issues	The study may have caused harm, deception, or failed to obtain informed consent	Milgram's participants showed signs of extreme stress; Zimbardo's Stanford Prison Experiment was stopped early due to participant distress

4. Real-World Applications

Evaluate whether the theory has practical applications.

• Theories that lead to effective treatments or interventions are strengthened by their practical utility.
• Examples: CBT from the cognitive approach, systematic desensitisation from the behaviourist approach, drug treatments from the biological approach.
• If a theory has no practical application, this can be framed as a limitation.

5. Issues and Debates (Essential for High Marks)

Each of the following debates can be used as an evaluation point for almost any essay:

Debate	How to use it in evaluation
Nature vs Nurture	Does the theory emphasise biological (nature) or environmental (nurture) factors? Is this balance appropriate?
Reductionism vs Holism	Does the theory reduce complex behaviour to simple components? Is this oversimplistic? Or does it take a holistic approach?
Determinism vs Free Will	Does the theory suggest behaviour is determined (by biology, environment, or unconscious forces)? Does this ignore personal choice?
Cultural Bias	Were key studies conducted in Western cultures only? Can the findings be generalised to other cultures? (Ethnocentrism)
Gender Bias	Were key studies conducted on one gender only? Does the theory assume male behaviour is the norm? (Androcentrism)
Idiographic vs Nomothetic	Does the theory aim to establish general laws (nomothetic) or understand individual experience (idiographic)?
Ethical implications	What are the ethical consequences of the theory? Could it be used to justify discrimination or control?

Exam Tip: Using Issues and Debates as evaluation points in Paper 1 and Paper 2 essays (not just Paper 3) demonstrates sophisticated understanding. Examiners reward students who show awareness of the broader context of psychology.

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Application Questions: Linking Psychology to the Scenario

Application questions (AO2) require you to use your knowledge to explain a situation described in the stimulus material. These appear on all three papers and carry significant marks.