Why is "Saying 'the brain got bigger' without naming a region" a common mistake in Hölzel et al. (Mindfulness & Brain Scans)?

Why it happens: Students remember the gist, not specifics. How to avoid it: Name a region (e.g. left hippocampus) and its function (memory/emotion). Specific regions are markable AO1. Source: 9990 mark schemes

Why is "Treating the study as 'mindfulness makes you happier'" a common mistake in Hölzel et al. (Mindfulness & Brain Scans)?

Why it happens: Confusing wellbeing benefits with the biological focus. How to avoid it: The measured outcome is STRUCTURAL brain change (grey matter), not mood. Keep the focus biological.

Why is "Calling Hölzel 'pure nature'" a common mistake in Hölzel et al. (Mindfulness & Brain Scans)?

Why it happens: Assuming the biological approach = nature only. How to avoid it: This is an INTERACTION example: nurture (meditation) changes nature (brain structure). Quoting this earns evaluation credit.

Why is "Writing 'the sample was unrepresentative' without saying how" a common mistake in Hölzel et al. (Mindfulness & Brain Scans)?

Why it happens: Stock evaluation phrase. How to avoid it: Be specific: '16 participants, all right-handed → may not generalise to left-handers.' This is exactly the point that lifts the answer to the top band. Source: 9990 Learner Guide — example response Q10

Why is "Over-claiming certainty of cause and effect" a common mistake in Hölzel et al. (Mindfulness & Brain Scans)?

Why it happens: The before/after design feels like proof. How to avoid it: The control group strengthens cause, but the small self-selected sample means say 'associated with' / 'linked to' rather than 'proves'.

Biological Approach (AS Level)Cambridge International A Level Psychology 9990

Hölzel et al. (Mindfulness & Brain Scans)

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next.

PreviousNext

Learn this Topic

Start with the slides for the quick version, then go deeper with the full study notes.

Short Study Notes in the form of Slides

Read the notes first. If the method in a worked example clicks, you're ready for the questions.

Short Study Notes — Hölzel et al. (Mindfulness & Brain Scans)

Start with these resources to cover the key concepts, then work through the practice questions.

Page 1 / 0

Detailed Notes

Full prose, callouts and a recap — built for A* mastery, not just a quick scan.

Take these study notes with you

Download a branded PDF — full prose, callouts, recap and memorise list for Hölzel et al. (Mindfulness & Brain Scans), ready to print or save offline.

Hölzel et al. (Mindfulness & Brain Scans) — Cambridge AS & A Level Psychology 9990 Study Notes (2024-2026)

The biological core study on how an 8-week mindfulness course increases grey matter. This note builds the neuroscience (plasticity, grey matter, what each region does, how MRI/VBM works), then drills the longitudinal design, the FFMQ, the results, and how to evaluate generalisations in context.

At a glance

Reference: Hölzel, B.K. et al. (2011) — mindfulness practice leads to increases in regional brain grey matter density.
Psychology investigated: mindfulness, localisation of function and brain plasticity.
Aim: test whether an 8-week MBSR (mindfulness-based stress reduction) course increases grey-matter concentration.
Method: experiment with a longitudinal design; MRI scans + self-report (FFMQ); uses correlations.
Sample: 16 in the MBSR group + 17 waiting-list controls (healthy but stressed adults; all right-handed).
Procedure: MRI before and after the course; grey matter compared in regions of interest; mindfulness measured by FFMQ.
Key result: increased grey matter in the left hippocampus (and PCC, TPJ, cerebellum); no change in controls.
Conclusion: mindfulness is associated with structural brain changes — the brain physically changes with experience (plasticity).

What you’ll learn

Mapped to the Cambridge International A Level 9990 syllabus (2024-2026).

Outline the psychology being investigated: mindfulness, localisation of function and brain plasticity.
Explain the neuroscience behind the study — neuroplasticity, grey matter, the functions of the named regions, and how MRI/VBM measures structure.
Describe the aim, sample and longitudinal MRI procedure of Hölzel et al. (2011), including the FFMQ.
Describe the results (grey-matter changes, including the left hippocampus) and the conclusion about brain plasticity.
Evaluate the study (longitudinal design, objective/subjective measures, generalisations) and relate it to issues and debates.

The neuroscience behind the study (background substance)

Plasticity lets experience reshape the brain; grey matter is measured by MRI/VBM; each region has a job.

This study only impresses if you understand the brain biology behind it — the part textbooks usually compress into 'the brain changed'.

Brain plasticity. The brain is not fixed: it can change its structure and connections in response to experience ('neuroplasticity'). Practising a skill repeatedly — including a mental skill like mindfulness — can increase the grey matter in the regions that skill uses, much as exercise builds a muscle.

Grey matter vs white matter. Grey matter is made mainly of neuron cell bodies and dendrites (where processing happens); white matter is the connecting 'wiring'. This study measured grey-matter concentration.

How was structure measured? Structural MRI (magnetic resonance imaging) produces detailed images of the brain. Researchers used voxel-based morphometry (VBM) — a technique that compares grey-matter concentration, voxel by voxel (a 'voxel' is a 3-D pixel) — to detect where grey matter changed. MRI is objective (a machine measures it), so the data are not biased by what participants believe or report.

What the named regions do (localisation of function):

Region	Main role	Why it fits mindfulness
Left hippocampus	Learning, memory, emotion regulation	Often reduced in stress/depression — so growth here matches mindfulness's calming effect
Posterior cingulate cortex (PCC)	Self-relevant thought, mind-wandering	Mindfulness trains attention to the present
Temporo-parietal junction (TPJ)	Perspective-taking, empathy	Mindfulness can increase compassion/awareness of others
Cerebellum	Coordinating cognition and emotion	Involved in emotion regulation

Measuring the experience — the FFMQ. Mindfulness itself is subjective, so it was measured by self-report using the Five Facet Mindfulness Questionnaire (FFMQ): observing, describing, acting with awareness, non-judging and non-reactivity. Pairing this subjective measure with the objective MRI is a real strength.

Neuroplasticity = experience physically reshapes the brain (skills 'build' grey matter).
Grey matter = cell bodies/dendrites (processing); measured by MRI + voxel-based morphometry (VBM).
MRI = objective measure of brain structure → low bias.
Left hippocampus = memory/emotion; PCC = self/attention; TPJ = perspective-taking; cerebellum = emotion regulation.
FFMQ (5 facets) = the subjective self-report of mindfulness.

Psychology investigated, background and aim

Can practising mindfulness physically change the brain's grey matter?

Psychology being investigated: mindfulness, localisation of function and brain plasticity.

Background. Mindfulness — paying non-judgemental attention to the present moment — was already known to improve wellbeing and reduce stress. Earlier scans had compared long-term meditators with non-meditators, but those were correlational: you cannot tell whether meditation caused a brain difference, or whether people who already have those brains are simply drawn to meditation.

Aim. To investigate whether taking part in an 8-week Mindfulness-Based Stress Reduction (MBSR) programme leads to measurable increases in grey-matter concentration in specific brain regions — a stronger, before-and-after test of cause than earlier correlational work.

Topic: mindfulness, localisation of function, brain plasticity.
Old research = correlational comparisons of meditators vs non-meditators (no cause).
Aim: does an 8-week MBSR course INCREASE grey matter?
A longitudinal before/after design with a control group tackles the cause problem.

Sample, design and procedure

16 MBSR participants vs 17 controls; MRI before and after; FFMQ self-report.

Sample: 16 participants completed the MBSR programme; 17 were on a waiting-list control group. They were healthy adults recruited because they reported elevated stress. All were right-handed — important for evaluation (generalisations).

Design: an experiment with an independent-measures comparison (MBSR group vs control) and a longitudinal / repeated-measures element (each person measured at two time points).

Procedure:

Pre-test MRI: structural MRI scans (analysed with VBM) were taken about two weeks before the course, for both groups.
The intervention: the MBSR group attended weekly group meetings, a full-day retreat, and did daily home practice with audio recordings (averaging around 27 minutes a day); practice time was recorded.
Post-test MRI: scans were repeated about two weeks after the 8-week course.
Self-report: participants completed the Five Facet Mindfulness Questionnaire (FFMQ) to measure changes in mindfulness.
Analysis: grey-matter concentration was compared before vs after, focusing on a priori regions of interest (e.g. hippocampus, PCC, TPJ, cerebellum) plus a whole-brain analysis; practice time was correlated with brain change.

16 MBSR + 17 waiting-list controls; healthy but stressed; all right-handed.
Independent-measures (MBSR vs control) + longitudinal (before & after).
MRI (VBM) pre- and post-course; ~27 min/day home practice (recorded).
FFMQ measured mindfulness; grey matter analysed in regions of interest + whole brain.

Results and conclusion

Grey matter rose in the left hippocampus (and other regions); controls showed no change.

Results:

The MBSR group showed increased grey-matter concentration in the left hippocampus (linked to learning, memory and emotion regulation).
A whole-brain analysis found further increases in the posterior cingulate cortex (PCC), the temporo-parietal junction (TPJ) and the cerebellum — regions linked to self-awareness, perspective-taking and emotion regulation.
The control group showed no such changes.
More time spent practising tended to correlate with greater change in some regions (supporting a dose–response link).

Conclusion:

Practising mindfulness is associated with structural changes in the brain — clear evidence of brain plasticity (the brain changing with experience).
The affected regions fit the known benefits of mindfulness (better memory, emotion regulation and perspective-taking), supporting localisation of function.
Because of the controlled before/after design, the changes can be more confidently linked to the mindfulness practice itself than in earlier correlational studies.

↑ grey matter in the LEFT HIPPOCAMPUS (learning, memory, emotion).
Also ↑ in PCC, TPJ and cerebellum (whole-brain analysis).
Control group → no change.
More practice ↔ more change (dose–response).
Conclusion: mindfulness → structural brain change = brain plasticity.

Evaluation — strengths, weaknesses, issues & debates

Strong before/after design with objective MRI, but a small, self-selected, right-handed sample limits generalisation.

Strengths

Longitudinal before-and-after design with a control group — much stronger evidence of cause than earlier correlational studies (the control rules out 'time passing' or repeated scanning).
Objective, quantitative MRI data — not affected by participant bias, so more valid and replicable.
Mixed methods — objective MRI + subjective FFMQ give a fuller picture; the dose–response correlation strengthens the case.

Weaknesses (great for the named issue)

Small sample (16 + 17), limiting generalisability.
All participants were right-handed — left-handed people can have different brain organisation, so results may not generalise to them. (This is the exact 'generalisations' point used in the Cambridge example answer.)
Self-selected/volunteer sample of stressed adults — may not represent the wider population (and volunteers may be unusually motivated).

Issues & debates

Nature vs nurture: a brilliant interaction example — nurture (mindfulness practice) physically changes nature (brain structure). Plasticity blurs the line between the two.
Application to everyday life: supports mindfulness/MBSR in therapy, stress management, schools and workplaces.
Individual differences: people varied in practice time, which correlated with brain change.

Strength: longitudinal before/after + control → stronger cause evidence.
Strength: objective MRI data → valid, replicable; plus FFMQ self-report (mixed methods).
Weakness: small sample (16+17) → limited generalisability.
Weakness: ALL right-handed → may not generalise to left-handers.
Debate: nature–nurture INTERACTION (nurture reshapes the brain); application to therapy.

How it’s examined

Paper 1 Section A: short-answer (e.g. 'name one brain region that changed', 'state how mindfulness was measured', 'outline the control group'). Section B: describe (~6 marks) and evaluate (8–10 marks). The Cambridge example response uses this exact study with 'generalisations' as the named issue (the right-handed sample) — so practise that point until it is automatic. Examiner guidance: name regions specifically and keep every evaluation point in context.

Sources: Cambridge International AS & A Level Psychology 9990 syllabus (2024-2026); Hölzel, B.K. et al. (2011) Psychiatry Research: Neuroimaging, 191(1): 36-43; 9990 Learner Guide — Specimen Paper 1 Q10 example response (Hölzel; 'generalisations'); 9990 Scheme of Work (for examination from 2024). Last reviewed 2026-05-21.

Master this Topic

Worked examples, formulae, definitions and the mistakes examiners flag — everything you need to push from a pass to an A*.

Take this whole topic with you

Download a branded revision sheet — worked examples, formulae, definitions and common mistakes for Hölzel et al. (Mindfulness & Brain Scans), ready to print or save as PDF.

Step-by-step worked examples — Hölzel et al. (Mindfulness & Brain Scans)

Step-by-step solutions to past-paper-style questions on hölzel et al. (mindfulness & brain scans), written exactly the way a tutor would explain them at the board.

1Name a brain region that changed (2 marks)
Getting started• results, AO1
Question
State one brain region in which grey matter increased in Hölzel et al.'s study, and one function of that region. (2 marks)
Step-by-step solution
1. Step 1
  Region: the left hippocampus.
2. Step 2
  Function: learning, memory and emotion regulation. (Other acceptable regions: PCC, TPJ, cerebellum.)
Answer
Left hippocampus — involved in learning, memory and emotion regulation. (2)
Examiner tip
Name a SPECIFIC region + a function. 'The brain' or 'grey matter' alone is too vague.
2How were the two variables measured? (2 marks)
Getting started• procedure, AO1
Question
State how Hölzel et al. measured (a) brain structure and (b) mindfulness. (2 marks)
Step-by-step solution
1. Step 1
  (a) Brain structure: MRI scans (grey-matter concentration).
2. Step 2
  (b) Mindfulness: the FFMQ (Five Facet Mindfulness Questionnaire), a self-report.
Answer
(a) MRI scans; (b) FFMQ self-report questionnaire. (2)
Examiner tip
1 mark each. Note this is a 'mixed-methods' design: objective MRI + subjective self-report.
3Explain the role of the control group (4 marks)
Building confidence• design, AO2
Question
Explain why Hölzel et al. used a control group (waiting-list) in their study. (4 marks)
Step-by-step solution
1. Step 1
  The control group (17 people) did not do the MBSR course during the study.
2. Step 2
  Their brains were scanned at the same two time points as the MBSR group.
3. Step 3
  If grey matter increased only in the MBSR group and not in the controls, the change is more likely due to mindfulness rather than the passage of time or repeated scanning.
4. Step 4
  This strengthens the claim of cause and effect (it controls for confounding variables).
Answer
The control group did no MBSR but was scanned at the same times; grey matter rose only in the MBSR group, so the change is attributable to mindfulness, not time — supporting cause and effect. (4)
Examiner tip
AO2 marks come from explaining the LOGIC of a control group (rules out alternative explanations), not just stating that there was one.
4State the conclusion (4 marks)
Building confidence• conclusion, AO1
Question
Describe the conclusion Hölzel et al. drew from their results. (4 marks)
Step-by-step solution
1. Step 1
  Practising mindfulness is associated with structural changes in the brain (increased grey matter).
2. Step 2
  This is evidence of brain plasticity — the brain changing with experience.
3. Step 3
  The regions affected (e.g. hippocampus) match the known benefits of mindfulness (memory, emotion regulation).
4. Step 4
  Because of the before/after, controlled design, the changes can be linked more confidently to the mindfulness practice.
Answer
Mindfulness is linked to increased grey matter (e.g. left hippocampus) — evidence of brain plasticity; the affected regions fit mindfulness's benefits. (4)
Examiner tip
Conclusions should not contain raw results — interpret them (plasticity, localisation, real-world benefit).
5Describe the procedure (6 marks)
Stretch• procedure, AO1, Paper 1
Question
Describe the procedure of Hölzel et al.'s study. (6 marks)
Step-by-step solution
1. Step 1
  Sample/design: 16 stressed but healthy adults did an 8-week MBSR course; 17 were a waiting-list control group (independent measures, longitudinal).
2. Step 2
  Pre-test: structural MRI scans were taken about two weeks before the course (both groups).
3. Step 3
  Intervention: the MBSR group attended weekly meetings and practised at home with audio recordings (~27 min/day); practice time was recorded.
4. Step 4
  Post-test: MRI scans were repeated about two weeks after the course.
5. Step 5
  Self-report: participants completed the FFMQ to measure mindfulness.
6. Step 6
  Analysis: grey-matter concentration was compared before vs after in regions of interest (e.g. hippocampus, PCC, TPJ, cerebellum) plus a whole-brain analysis.
Answer
16 MBSR + 17 controls; MRI before and after an 8-week course (~27 min/day home practice); FFMQ self-report; grey matter compared in regions of interest + whole brain. (6)
Examiner tip
Top band: sample/design, pre- and post-MRI, the intervention, the FFMQ, and the grey-matter analysis. The longitudinal before/after detail is essential.
6Evaluate — generalisations (4 marks)
Stretch• evaluation, AO3, generalisations, exam-technique
Question
Evaluate Hölzel et al.'s study by explaining one weakness to do with generalisations. (4 marks)
Step-by-step solution
1. Step 1
  Point. The findings may have limited generalisability.
2. Step 2
  Explain. The sample was small and not representative of everyone.
3. Step 3
  Evidence (in context). There were only 16 MBSR participants, and all of them were right-handed.
4. Step 4
  Link. Left-handed people can have different brain organisation, so the grey-matter changes might not occur in the same way in them — limiting how widely the results generalise.
Answer
Only 16 MBSR participants, all right-handed → results may not generalise to left-handed people, whose brains can be organised differently. (4)
Examiner tip
This is the exact point used in the Cambridge example response. The 'right-handed → left-handers differ' chain makes it IN CONTEXT and explained — top of the band.

Model Answers — Hölzel et al. (Mindfulness & Brain Scans)

High-scoring sample answers for hölzel et al. (mindfulness & brain scans) on the Cambridge International A Level 9990 paper, with examiner-style notes mapping each response to the mark scheme and assessment objectives.

Question 1
9990 Paper 1 Section B (describe) style6 marks
Q (6 marks). Describe how Hölzel et al. investigated whether mindfulness affects brain structure.
Model answer
Hölzel et al. used an experiment with a longitudinal (before-and-after) design. 16 healthy but stressed adults took part in an 8-week Mindfulness-Based Stress Reduction (MBSR) programme, while 17 people formed a waiting-list control group who did not take the course during the study.

Structural MRI scans were taken about two weeks before and again about two weeks after the course for both groups, so that changes in grey-matter concentration could be measured. During the course the MBSR group attended weekly meetings and practised at home with audio recordings (about 27 minutes a day on average), and their practice time was recorded. Participants also completed the Five Facet Mindfulness Questionnaire (FFMQ) as a self-report measure of mindfulness.

Grey-matter concentration was then compared before versus after, focusing on specific regions of interest such as the hippocampus, posterior cingulate cortex, temporo-parietal junction and cerebellum, as well as a whole-brain analysis.
Why this scores
Why this scores well. It includes the design (longitudinal, control group), both MRI time points, the intervention with home-practice detail, the FFMQ self-report, and what was analysed. That combination of objective (MRI) and subjective (FFMQ) measures, plus the before/after structure, is exactly what the top band rewards.
Question 2
9990 Learner Guide example response (adapted, top-band version)10 marks
Q (10 marks). Evaluate the study by Hölzel et al. (mindfulness and brain scans) in terms of two strengths and two weaknesses. At least one of your evaluation points must be about generalisations.
Model answer
Strength 1 — strong before-and-after design with a control group. Earlier studies simply compared meditators with non-meditators, which is correlational. Hölzel scanned the MBSR group before and after an 8-week course and compared them with a waiting-list control group. Because grey matter increased only in the MBSR group, the change can be linked more confidently to the mindfulness practice — much stronger evidence of cause and effect.

Strength 2 — objective, quantitative data. Brain structure was measured with MRI, an objective measure that is not affected by participant bias or demand characteristics. This makes the data more valid and the study replicable, supporting the conclusion that grey matter increased (for example, in the left hippocampus).

Weakness 1 — generalisations (named issue). The sample was small and limited: only 16 participants completed the MBSR course, and all of them were right-handed. Left-handed people can have different brain organisation, so the grey-matter changes found here may not occur in the same way in left-handed people. This limits how widely the findings can be generalised.

Weakness 2 — self-selected, stressed sample. Participants were volunteers recruited because they reported high stress, so they may not represent the general population. Volunteers may also be especially motivated, which could affect how much they practised and benefited.

Conclusion. The longitudinal, controlled design and objective MRI data make the evidence for brain plasticity convincing, but the small, right-handed, self-selected sample means the results should be generalised with caution until replicated with a larger, more varied sample.
Why this scores
Why this reaches the top band (vs the 7/10 example). It gives exactly two strengths and two weaknesses, the named issue (generalisations) is fully in context ('16 right-handed participants → left-handers differ'), each point follows PEEL, and there is a reasoned conclusion. The Cambridge example scored 7/10 mainly because one 'strength' (replicability) was not tied to this study — here every point is anchored in Hölzel.
Question 3
9990 Paper 1 Section B (describe) style6 marks
Q (6 marks). Describe the results and the conclusion of Hölzel et al.'s study.
Model answer
Results. After the 8-week MBSR course, the mindfulness group showed an increase in grey-matter concentration in the left hippocampus — a region linked to learning, memory and emotion regulation. A whole-brain analysis found further increases in the posterior cingulate cortex, the temporo-parietal junction and the cerebellum. The waiting-list control group showed no such changes, and more time spent practising tended to be associated with greater change.

Conclusion. Hölzel et al. concluded that practising mindfulness is associated with structural changes in the brain — clear evidence of brain plasticity, the brain's ability to change with experience. Because the regions affected (such as the hippocampus) are involved in memory and emotion regulation, the changes fit the known benefits of mindfulness and support localisation of function. As the change occurred only in the MBSR group, it can be linked more confidently to the mindfulness practice than in earlier correlational studies.
Why this scores
Why this scores well. Specific regions are named (left hippocampus + others) with functions, the control comparison is included (no change), and the conclusion interprets the data as plasticity/localisation rather than just repeating it. Naming regions is a frequent mark-scheme requirement.
Question 4
9990 Paper 1 Section B (discussion) style8 marks
Q (8 marks). Discuss what the study by Hölzel et al. tells us about the nature–nurture debate.
Model answer
A 'nature' study with a 'nurture' twist. Hölzel et al. sits in the biological approach, which usually emphasises nature — here, brain structure (grey matter). But the study's key message is actually about the interaction of nature and nurture, not nature alone.

Evidence for interaction. The participants' brains were not fixed. After an environmental experience — an 8-week mindfulness (MBSR) course, a clear nurture factor — grey matter increased in the left hippocampus, while the control group's brains did not change. This shows nurture physically changing nature: experience reshaping the biological structure of the brain. The phenomenon is brain plasticity, and it blurs the line between the two sides of the debate.

Why this matters. It challenges the simple idea that biology is fixed at birth and only the environment can change. Instead, biology and environment are in constant two-way interaction: our experiences build our brains, and our brains shape our behaviour.

Conclusion. Hölzel et al. supports an interactionist view of the nature–nurture debate. Although it is a biological study measuring a biological outcome (grey matter), the cause of the change was environmental, so the study shows that nature and nurture are best understood as working together rather than as opposites.
Why this scores
Why this reaches the top band. It avoids the trap of calling the study 'pure nature', argues the interaction position with specific evidence (MBSR → grey-matter increase; control unchanged), explains plasticity, and concludes with a clear judgement (AO3). This nuance is exactly what discussion questions reward.

Key Definitions and Keywords — Hölzel et al. (Mindfulness & Brain Scans)

Definitions to memorise and the exact keywords mark schemes credit for hölzel et al. (mindfulness & brain scans) answers — sharpened from recent examiner reports for the 2026 Cambridge International A Level 9990 sitting.

Mindfulness
Examiner keyword
Paying non-judgemental attention to the present moment. Trained here through an 8-week MBSR programme.
MBSR (Mindfulness-Based Stress Reduction)
Examiner keyword
An 8-week structured programme of mindfulness training (weekly meetings + daily home practice) used as the intervention in this study.
Grey matter
Examiner keyword
Brain tissue made up mainly of nerve-cell bodies; its concentration increased in certain regions after MBSR.
MRI
Examiner keyword
Magnetic Resonance Imaging — a brain-scanning technique giving an objective, detailed image of brain structure.
FFMQ (Five Facet Mindfulness Questionnaire)
A self-report questionnaire measuring mindfulness; the subjective measure in this mixed-methods study.
Brain plasticity
Examiner keyword
The brain's ability to change its structure in response to experience — shown by grey-matter increases after mindfulness practice.
Longitudinal design
Examiner keyword
A study that measures the same participants at more than one point in time (here, MRI before and after the 8-week course).
Localisation of function
The idea that specific brain regions carry out specific functions — e.g. the hippocampus for memory and emotion regulation.
Control group
A group not given the treatment (here, the waiting-list group), used as a baseline to isolate the effect of the independent variable.

Common Mistakes and Misconceptions — Hölzel et al. (Mindfulness & Brain Scans)

The traps other students keep falling into on hölzel et al. (mindfulness & brain scans) questions — taken from recent Cambridge International A Level 9990 examiner reports and mark schemes — and how to avoid them.

✕Saying 'the brain got bigger' without naming a region
9990 mark schemes
Why it happens
Students remember the gist, not specifics.
How to avoid it
Name a region (e.g. left hippocampus) and its function (memory/emotion). Specific regions are markable AO1.
✕Treating the study as 'mindfulness makes you happier'
Why it happens
Confusing wellbeing benefits with the biological focus.
How to avoid it
The measured outcome is STRUCTURAL brain change (grey matter), not mood. Keep the focus biological.
✕Calling Hölzel 'pure nature'
Why it happens
Assuming the biological approach = nature only.
How to avoid it
This is an INTERACTION example: nurture (meditation) changes nature (brain structure). Quoting this earns evaluation credit.
✕Writing 'the sample was unrepresentative' without saying how
9990 Learner Guide — example response Q10
Why it happens
Stock evaluation phrase.
How to avoid it
Be specific: '16 participants, all right-handed → may not generalise to left-handers.' This is exactly the point that lifts the answer to the top band.
✕Over-claiming certainty of cause and effect
Why it happens
The before/after design feels like proof.
How to avoid it
The control group strengthens cause, but the small self-selected sample means say 'associated with' / 'linked to' rather than 'proves'.

Practice questions

Exam-style questions with step-by-step worked solutions. Try one before checking the method.

Past paper style quiz

Get a report showing which sub-topics you've nailed and which ones still need work.

Hölzel et al. (Mindfulness & Brain Scans)

Short Study Notes in the form of Slides

Short Study Notes — Hölzel et al. (Mindfulness & Brain Scans)

Detailed Notes

What you’ll learn

How it’s examined

1Name a brain region that changed (2 marks)

2How were the two variables measured? (2 marks)

3Explain the role of the control group (4 marks)

4State the conclusion (4 marks)

5Describe the procedure (6 marks)

6Evaluate — generalisations (4 marks)

Mindfulness

MBSR (Mindfulness-Based Stress Reduction)

Grey matter

MRI

FFMQ (Five Facet Mindfulness Questionnaire)

Brain plasticity

Longitudinal design

Localisation of function

Control group

✕Saying 'the brain got bigger' without naming a region

✕Treating the study as 'mindfulness makes you happier'

✕Calling Hölzel 'pure nature'

✕Writing 'the sample was unrepresentative' without saying how

✕Over-claiming certainty of cause and effect

Practice questions

Past paper style quiz

Assess your understanding