GCSE Psychology Revision Guide: Studies, Approaches, and Writing Strong Evaluation

GCSE Psychology is assessed on two skills in roughly equal measure: knowledge of psychological studies and theories, and the ability to evaluate that knowledge — to assess its limitations, methodological issues, and the extent to which conclusions can be generalised. Students who only learn the content without practising evaluation consistently score at grade 5–6; those who can fluently evaluate studies using methodological vocabulary consistently reach grade 7–8.

This guide covers both dimensions: what to know and how to evaluate it.

The psychological approaches: connecting studies to frameworks

AQA GCSE Psychology organises content around topic areas, but underlying each topic are broader psychological approaches — ways of explaining human behaviour. Understanding these approaches helps you evaluate any study by asking which explanatory framework it assumes.

Cognitive approach: Explains behaviour through internal mental processes — attention, memory, perception, thought. Studies like Loftus and Palmer on eyewitness testimony assume that memory is reconstructive (we rebuild memories, potentially distorted by subsequent information) rather than reproductive (memories are accurate recordings). This is a strength of the cognitive approach (explanatory power) but also generates questions about validity — can laboratory memory tasks replicate the conditions of real crime witnesses?

Biological approach: Explains behaviour through brain structure, genetics, and neurochemistry. The neuropsychology section of GCSE Psychology uses cases of brain damage (phineas gage, HM) to establish links between brain regions and behaviour. The approach is scientific and reductionist — it reduces complex behaviour to neural correlates, which is both a strength (precise, measurable) and a limitation (ignores social context, conscious experience).

Social approach: Explains behaviour through social influence — how other people's actual or imagined presence affects individual behaviour. Milgram and Asch both demonstrate powerful social influences on individual behaviour, challenging the assumption of individual rational agency.

Developmental approach: Explains behaviour through developmental stages — how cognitive, emotional, and social capacities develop with age. Piaget's stages (sensorimotor → preoperational → concrete operational → formal operational) describe qualitative changes in children's thinking.

Create a Cornell Notes page per approach using the Cornell Notes Tool. Main column: what the approach assumes, key concepts, core studies. Cue column: strengths (scientific? Practical applications? Deterministic or interactionist?), limitations (reductionist? Deterministic? Ignores X?). Summary: which studies you would cite as evidence for or against the approach.

Core studies: what to know and how deeply

For each core study, build a structured knowledge base using the Flashcard Tool. The most efficient flashcard format for Psychology:

Card 1 (Recall): Front — 'Milgram (1963): what was the procedure?' Back — '40 male American participants; Yale lab; teacher-learner paradigm; confederate as learner; participant teacher; 15-450V shock generator; four standardised prods; 65% continued to 450V'

Card 2 (Evaluation): Front — 'Milgram (1963): give one methodological limitation.' Back — 'Low ecological validity — artificial laboratory setting with novel shock apparatus may not reflect real-world obedience situations, where authority is less direct and commands more ambiguous. However, Hofling et al. (1966) found similar obedience rates in a naturalistic hospital setting, suggesting limited generalisability of this criticism.'

Card 3 (Application): Front — 'Use Milgram's findings to explain how atrocities can be carried out by ordinary people.' Back — 'Milgram's agentic state theory suggests ordinary people can commit harmful acts when they transfer moral responsibility to an authority figure; this explains how individuals can follow institutional orders without perceiving themselves as responsible for outcomes.'

Key studies revision priorities (AQA):

Asch (1955/1956): Participants gave clearly wrong answers to a line judgement task when a unanimous majority gave the wrong answer first. 32% conformity rate overall; conformity decreased when one confederate broke from the majority (social support effect). Evaluation: artificial task lacks mundane realism; may reflect 1950s American cultural conformity rather than a universal tendency.

Loftus and Palmer (1974): Participants watched car crash videos, then answered questions including 'How fast were the cars going when they [smashed/hit/contacted] each other?' The 'smashed' group estimated significantly higher speeds (40.8 mph) than 'contacted' (31.8 mph). A week later, 'smashed' group more likely to report broken glass (not present). Evaluation: high control (lab experiment); low ecological validity (witnessing real accidents involves greater stress and personal involvement than watching a video clip).

Research methods: the questions that appear everywhere

Research methods questions at GCSE Psychology are application questions — they present a scenario or study and ask you to apply methodological concepts. You cannot answer these well by knowing the definitions alone; you must be able to apply them.

The most common application patterns:

Designing a study: 'A psychologist wants to investigate whether sleep affects memory. Design a study.' → Identify: IV (amount of sleep); DV (memory test score, measured how precisely?); Controls (same memory test for all participants; similar age and education; controlled environment); Sampling method (opportunity? Random?); Ethical considerations (right to withdraw, informed consent, no sleep deprivation beyond safe limits).

Evaluating a study: 'A psychologist conducted a covert observation of shoplifting in a supermarket. Evaluate this method.' → Strengths: naturalistic behaviour (participants don't know they're being observed, so no demand characteristics); high ecological validity. Limitations: ethical issue (no consent obtained); covert observations cannot clarify participants' intentions; observer effects may still occur if the researcher is visible.

Identifying variables: Any question with an experiment requires identification of IV, DV, and potential extraneous variables. Practise this systematically on every study you learn.

Exam technique: the 3-4 mark evaluation question

The most reliable mark gains in GCSE Psychology come from evaluation questions, because they follow a predictable format and reward a consistent answer structure.

For a 4-mark evaluation question (one strength and one weakness):

Strength: 'One strength of [study/method] is that it has high [validity/reliability/generalisability]. This is because [specific reason relating to this study]. This means that [what this implies about the usefulness of the findings].'

Weakness: 'One weakness of [study/method] is that it has low [validity/reliability/generalisability]. This is because [specific reason]. This is a problem because it means we cannot [specific implication — generalise to other populations, apply findings to real-world settings, conclude causation].'

Write the full three-sentence structure for each evaluation point. Single-sentence evaluations ('it has low ecological validity because it was a lab study') earn 1 mark; the three-sentence structure earns 2 marks per point.

Use the Pomodoro Timer for evaluation practice: one 25-minute session per week writing evaluation paragraphs for three different studies, without notes, then comparing to model answers. The Active Recall course covers the evidence for why writing from memory (retrieval practice) develops evaluation fluency faster than reviewing written evaluations.

See A Level Psychology study guide for the next level of study and evaluation depth after GCSE, and GCSE Biology revision guide for the required practical evaluation skills that parallel Psychology's research methods questions.