PS18: Neuropsychology & Brain Scanning
How we study the brain: CT scans, MRI, fMRI, EEG, and post-mortem examinations. What neuropsychology tells us about brain-behaviour relationships and the strengths and limitations of each method.
Neuropsychology & Brain Scanning
How we study the brain: CT scans, MRI, fMRI, EEG, and post-mortem examinations. What neuropsychology tells us about brain-behaviour relationships and the strengths and limitations of each method.
Key Fact: CT scans (Computed Tomography): use X-rays to create cross-sectional images of the brain. Show structure but not function. Useful for detecting tumours, bleeding and structural damage. Limitation: only shows anatomy, not activity.
Key Fact: MRI (Magnetic Resonance Imaging): uses strong magnetic fields and radio waves to create detailed structural images. Higher resolution than CT. Shows brain structure in fine detail. Limitation: still only shows structure, not function; expensive; claustrophobic for some patients.
Key Fact: fMRI (functional MRI): measures changes in blood oxygenation (active brain areas use more oxygenated blood). Shows both structure AND function - which areas are active during tasks. Limitation: temporal resolution is poor (changes over seconds, not milliseconds); expensive; cannot determine if activity causes behaviour or is a consequence.
Key Fact: EEG (Electroencephalogram): records electrical brain activity through electrodes on the scalp. Excellent temporal resolution (milliseconds). Used to study sleep stages and diagnose epilepsy. Limitation: poor spatial resolution (cannot pinpoint exact brain location of activity).
Key Fact: Post-mortem examinations: studying the brain after death to link structural damage to behavioural deficits observed during life. Examples: Broca studied Tan's brain post-mortem; HM's brain was donated for study. Limitation: correlation does not prove causation; changes after death may distort findings; ethics of consent.
📋 Key Vocabulary and Concepts
For Neuropsychology & Brain Scanning, you must know:
- CT scan
- MRI
- fMRI
- EEG
- Post-mortem examination
- Structural scan
- Functional scan
- Spatial resolution
- Temporal resolution
- Haemodynamic response
- Electrode
- Epilepsy diagnosis
- Broca's patient Tan
- Case of HM
❓ Practice Questions
Q1: Compare structural and functional brain scanning methods, giving one strength and one limitation of each.
Q2: Explain how fMRI works and evaluate its usefulness for studying brain function.
Q3: A researcher wants to study which brain areas are active during a memory task. Which scanning method would be most appropriate and why?
✅ Answers
- Structural (CT, MRI): show brain anatomy, detect damage. CT: quick but lower resolution and uses radiation. MRI: high resolution, no radiation, but slow and expensive. Functional (fMRI, EEG): show brain activity. fMRI: shows which areas are active, good spatial resolution, poor temporal resolution. EEG: shows when activity occurs, excellent temporal resolution, poor spatial resolution.
- fMRI measures blood flow changes - active areas use more oxygen, so oxygenated blood increases there. Strengths: non-invasive, shows both structure and function, good spatial resolution for locating active areas. Limitations: poor temporal resolution (delay of seconds between neural activity and blood flow change), expensive, participants must lie still, correlation doesn't prove causation.
- fMRI would be most appropriate: it shows which specific brain areas are active during the memory task (spatial resolution), which is needed to identify regions involved. EEG would show WHEN activity occurs but not WHERE. MRI would show structure but not activity. The researcher would compare fMRI scans during the memory task vs rest to identify active regions.
🎯 Exam Tips
- CT/MRI = STRUCTURE (what does the brain look like?). fMRI/EEG = FUNCTION (what is the brain doing?).
- fMRI: good WHERE (spatial), bad WHEN (temporal). EEG: good WHEN (temporal), bad WHERE (spatial).
- All scanning methods are CORRELATIONAL - they show associations, not causation.
📝 Exam Technique
Psychology Exam Tips:
When evaluating brain scanning methods, always consider: spatial vs temporal resolution, whether the method shows structure or function, whether findings are correlational or causal, and practical issues (cost, availability, ethics).
When evaluating brain scanning methods, always consider: spatial vs temporal resolution, whether the method shows structure or function, whether findings are correlational or causal, and practical issues (cost, availability, ethics).
⚠️ Common Errors
Watch Out!
Students often make mistakes here. Wrong: Brain scans can tell us exactly what a person is thinking or feeling. Correct: Brain scans show which areas are active but cannot reveal specific thoughts or feelings. fMRI shows increased blood flow to regions, but this is correlational - we cannot determine whether the activity causes the thought or is a byproduct. Different people may use different brain regions for the same task. Brain scanning provides valuable but incomplete information about brain-behaviour relationships.
✍️ Model Answer
Full-Mark Response
Evaluate the contribution of brain scanning methods to our understanding of brain-behaviour relationships.
A grade 9 response will: describe each method (CT, MRI, fMRI, EEG, post-mortem) with strengths and limitations; evaluate structural methods (good for identifying damage but don't show function); evaluate functional methods (show activity but are correlational); consider the complementary nature of methods (EEG for timing, fMRI for location); conclude: brain scanning has revolutionised neuropsychology by providing non-invasive ways to study the living brain, but all methods are correlational and none can establish causation alone. Combining methods (e.g. fMRI for location + EEG for timing) and using experimental designs provides the strongest evidence.
📊 AO Deep Dive
Assessment Objective Focus: Neuropsychology & Brain Scanning
AO1 — Knowledge: Demonstrate knowledge of Neuropsychology & Brain Scanning including key definitions, research studies and psychological terminology.
AO2 — Application: Apply your understanding of Neuropsychology & Brain Scanning to real-world scenarios and given contexts. Use research evidence to support your points.
AO3 — Analysis & Evaluation: Evaluate psychological theories and studies related to Neuropsychology & Brain Scanning, considering methodological strengths and weaknesses, and reaching a balanced conclusion.
📝 Exam Questions by Topic
🎬 Video Resources
Detailed Notes
Key Studies and Theories in Neuropsychology & Brain Scanning
Neuropsychology & Brain Scanning is a core topic in GCSE Psychology that requires understanding of key studies, theories and research methods. The AQA, OCR and Edexcel specifications all require you to know specific studies in detail, evaluate their methodology, and apply psychological concepts to real-life scenarios. When studying neuropsychology & brain scanning, focus on: the aims, methods, results and conclusions of key studies; the strengths and weaknesses of the research methods used; and how psychological understanding of neuropsychology & brain scanning applies to everyday life.
Key studies in this area typically use specific research methods such as experiments, observations, self-report (questionnaires and interviews), or correlational analysis. When evaluating studies, consider: reliability (can the study be replicated?); validity (does it measure what it claims to measure?); ethics (were participants protected from harm?); generalisability (can the findings be applied beyond the study sample?); and usefulness (does the research have practical applications?).
GCSE Psychology emphasises the application of psychological knowledge to real contexts. You must be able to explain how understanding of neuropsychology & brain scanning can be used to improve people’s lives, influence policy, or solve practical problems.
GCSE Example: Key Studies and Theories in Neuropsychology & Brain Scanning
When writing about a study related to neuropsychology & brain scanning, use the AMRC format: Aim (what was the study trying to find out?), Method (how was it conducted — design, sample, procedure?), Results (what were the key findings?), Conclusions (what do the results mean?).
Evaluating Research in Neuropsychology & Brain Scanning
Evaluation is a crucial skill in GCSE Psychology. When evaluating studies related to neuropsychology & brain scanning, use the GRAVE method: Generalisability (can the findings be applied to the wider population?), Reliability (are the results consistent if the study is repeated?), Applications (how can the findings be used in real life?), Validity (does the study measure what it claims to measure?), and Ethics (were participants treated ethically?).
Research methods commonly used in neuropsychology & brain scanning research include: laboratory experiments (high control but low ecological validity), field experiments (more realistic but less control), natural experiments (no manipulation of variables), case studies (in-depth but not generalisable), questionnaires (large samples but social desirability bias), and observations (natural behaviour but ethical concerns). Each method has strengths and limitations that must be evaluated in context.
Ethical issues in neuropsychology & brain scanning research include: informed consent (participants must agree to take part), debriefing (explaining the true purpose after the study), confidentiality (protecting participants’ identities), protection from harm (no physical or psychological damage), and right to withdraw (participants can leave at any time). The BPS Code of Conduct governs ethical standards in UK psychological research.
GCSE Example: Evaluating Research in Neuropsychology & Brain Scanning
When evaluating Milgram’s obedience study, you might note: low generalisability (all male, American sample); high reliability (standardised procedure with 65% obedience rate); useful applications (understanding wartime atrocities); low ecological validity (artificial laboratory setting); and serious ethical concerns (deception, psychological distress).
Applying Neuropsychology & Brain Scanning to Real Life
GCSE Psychology requires you to apply psychological understanding of neuropsychology & brain scanning to everyday situations. Consider how the theories and studies you have learned about explain real behaviour: How does neuropsychology & brain scanning affect people in schools, workplaces, families and communities? What interventions or strategies could improve outcomes based on psychological evidence?
When applying neuropsychology & brain scanning to real-life scenarios, use the following structure: identify the relevant psychological concept, explain how it applies to the scenario, support your explanation with evidence from a named study, and evaluate the strength of the application (are there limitations or alternative explanations?).
The most effective GCSE Psychology answers show a clear link between theory, evidence and application. Avoid vague statements like ‘psychology can help’ — instead, specify which psychological concept applies, which study supports it, and exactly how it could be used in the given scenario.
GCSE Example: Applying Neuropsychology & Brain Scanning to Real Life
A strong application answer: ‘Understanding of neuropsychology & brain scanning could help in schools by [specific application]. This is supported by [named study] which found that [specific finding]. This means that [specific practical recommendation]. However, a limitation is [specific weakness of applying this research].’
Comparison Table
| Evaluation Criterion | What It Means | How to Assess It |
|---|---|---|
| Generalisability | Can findings apply beyond the sample? | Consider sample size, representativeness, culture |
| Reliability | Are results consistent if repeated? | Standardised procedures, replicability |
| Validity | Does it measure what it claims? | Ecological validity, construct validity |
| Ethics | Were participants protected? | Consent, debriefing, protection from harm |
| Applications | Is the research useful? | Practical implications, real-world relevance |
Additional Practice Questions
Q: Describe one study related to neuropsychology & brain scanning and evaluate its methodology using the GRAVE method.
A: A key study in neuropsychology & brain scanning investigated [aim] using [method] with [sample]. The results showed [key finding], leading to the conclusion that [interpretation]. Evaluation: Generalisability — limited by [sample issue]; Reliability — strengthened by [standardisation]; Applications — useful for [practical application]; Validity — limited by [validity concern]; Ethics — problematic because [ethical issue]. Overall, the study makes a valuable contribution but has limitations that should be considered when applying the findings.
Q: Explain how psychological understanding of neuropsychology & brain scanning could be applied to improve a real-life situation.
A: Understanding of neuropsychology & brain scanning can be applied to improve [specific situation]. Research by [named psychologist] found that [key finding], which suggests that [practical recommendation]. For example, in a school context, this understanding could lead to [specific intervention] which would benefit people by [specific improvement]. However, individual differences mean that not everyone will respond the same way, so a personalised approach may be needed.
Ready to ace your GCSE Psychology exams?
Get the best revision books and guides to boost your grades.