What Is PEEL? How to Write an A* Evaluation Paragraph in A-Level Psychology
The four-step paragraph structure behind top-band AO3, and the one step most students skip
Most students lose AO3 marks not because they lack knowledge, but because they list evaluation points instead of developing them. A student who knows ten evaluation points but explains none of them will consistently score lower than a student who knows three and develops each one fully.
PEEL is the structure that turns a one-line criticism into a fully developed paragraph. This guide explains what each letter means, shows a complete worked example, and covers the mistakes that cost strong students marks.
PEEL in One Sentence
PEEL stands for Point, Evidence, Explain, Link. In A-Level Psychology, the final “Link” step is best thought of as a Significance (SO) statement: a sentence explaining why the point actually matters for the theory being evaluated.
A single sentence that states a criticism without explaining it or drawing out its significance rarely earns full marks against AQA’s AO3 descriptors. Fewer points, properly built, outscore more points listed.
The Four Steps, One by One
A specific evaluative statement. Say whether it is a strength or a limitation, and exactly what the claim is.
Strong: “One limitation of the theory is that it is based mainly on an artificial laboratory task.”
A named study, researcher and date, with a real figure or finding wherever one exists.
Strong: “Milgram (1963) found that 65% of participants went to the maximum 450V.”
Say how the evidence supports the point. This is the step that disappears under exam pressure, because the logic feels obvious in your head. It is not obvious to an examiner reading your answer cold.
Strong: “This suggests that [the mechanism], which is why [the finding] supports [the claim].”
Why does this matter? The SO must say something the Point and Evidence haven’t already said. It is the single biggest difference between a Level 2 and a Level 4 evaluation.
Strong: “This decreases the ecological validity of the theory, since behaviour in a one-hour lab task may not predict how people respond to authority in real workplaces.”
A Full Worked Example
Here is PEEL applied to a real topic: the legitimacy of authority explanation for obedience (Social Influence, Paper 1).
A strength of the legitimacy of authority explanation is that it is supported by research that directly changed how legitimate the authority appeared.
In one of Milgram’s variations, the study was moved from Yale University to a run-down office building, and obedience fell from 65% to 47.5%.
This suggests that the prestige of the setting made the experimenter seem more legitimate, so participants were more willing to accept his right to give orders.
This strengthens the legitimacy explanation, since the orders, the task and the experimenter stayed the same: only the perceived status of the setting changed, and obedience changed with it.
Written out in full, it reads as one connected paragraph:
Why This Example Works: Evidence That Moves a Variable
Evidence that moves a variable outscores evidence that only states an outcome. “65% obeyed” shows obedience was common, but not what caused it. “65% at Yale versus 47.5% in a run-down office” isolates the exact variable the Point claims matters. When you have a choice of studies for the same Point, pick the one with a comparison built in.
The Swap Test: Is Your SO Actually Doing Anything?
Before you finish an SO, ask one question: could this exact sentence be pasted under a different point in the same essay, unchanged, and still sound fine? If yes, it has failed, however well-written it is.
This could sit under almost any strength for any theory. It adds nothing the Point and Evidence hadn’t already said.
This names exactly what was held constant and what changed. It only makes sense under this specific point.
Sentence Starters That Help (Without Becoming a Script)
These starters are safe: they appear in real scripts credited with full marks. But if every strength in your essay ends with the same phrase, it reads as formulaic, so treat them as a safety net, not a template.
| Job | Example starters |
|---|---|
| Explain | “This suggests that…” / “This shows that…” |
| Strength closer | “This strengthens ___, since…” / “This increases the credibility of ___, since…” |
| Limitation closer | “This means ___ cannot fully explain…” / “This decreases the validity of ___, since…” |
| Can’t-generalise closer | “Therefore, this cannot be generalised to ___, since…” |
| Comparison | “Therefore, a complete account of ___ needs both ___ and ___.” |
What If You Don’t Have a Study?
A named study with a real figure is always your strongest option, but it is not the only one. If the Evidence slot is genuinely empty, these are credited alternatives:
Four real fallbacks for the Evidence step
- Name a real-world application. Not “it has practical applications,” but the actual thing. A real 14/16 script earned full AO3 credit by naming Rogers’ client-centred therapy and Freud’s psychoanalysis, with no study at all.
- Name a rival theory. State its mechanism in one clause and say what it contradicts, e.g. learning theory’s “cupboard love” account contradicting Bowlby’s monotropic theory.
- Evaluate the general methodology. “Obedience research largely takes place in lab settings” is a point in its own right, with a study used as an example rather than as the evidence.
- Point out the concept can’t be measured. Works for hypothetical constructs like the unconscious, the internal working model or a schema.
Going Further: Adding a Counterpoint
On an 8-marker, or on your strongest point in a 16-marker, you can build a PEEL paragraph further by adding a brief “however…” after the SO. Use it on the point where you have the most to say, not on every point: breadth across the essay still matters.
However, the change in setting may also have altered other factors, such as how seriously participants took the study, so the drop cannot be attributed to legitimacy alone.
The Costly Mistakes
- Missing the Explain step: jumping straight from evidence to significance. The most expensive habit in real scripts.
- An SO that just restates the Point: run the Swap Test. If it could sit under a different point unchanged, it’s decoration, not evaluation.
- Attacking the wrong target: a valid criticism of a study, used on a question that asked about a model or process the study doesn’t define. Check your point attacks what the question actually named.
- Forcing GRAVE vocabulary in: naming “validity” on a point that is really about individual differences or predictive power. Use the term only when it’s genuinely earned.
- Citing a figure you half-remember: “a notably higher proportion,” with the correct direction of effect, outscores a precise-sounding but wrong number.
The Bottom Line
PEEL is not a box-ticking exercise. It is a way of making sure every evaluation point does all four jobs the mark scheme rewards: a specific Point, Evidence that moves a variable, an Explain step that states the mechanism plainly, and a Significance statement that passes the Swap Test. Three paragraphs built this way will outscore ten points listed one line at a time.
Every Evaluation Point Already Built to PEEL
The Complete Topic Notes give you a Point, Evidence, Explain and SO for every listed evaluation point across the specification, so in the exam you are expanding a structure you’ve already learned, not inventing one under pressure.
Want Your Paragraphs Marked, Not Just Read?
Mr K Psychology tutoring is built around exactly this: marking your real essays against AQA levels descriptors and fixing the specific step, usually Explain or SO, where your marks are leaking.