PS1: Memory
How memory works: encoding, storage and retrieval. The multi-store model, types of long-term memory, and factors affecting the accuracy of memory including eyewitness testimony.
Memory
How memory works: encoding, storage and retrieval. The multi-store model, types of long-term memory, and factors affecting the accuracy of memory including eyewitness testimony.
Key Fact: Memory is the process of encoding, storing and retrieving information. Encoding converts sensory input into a storable form; storage retains it; retrieval accesses it when needed.
Key Fact: The Multi-Store Model (Atkinson & Shiffrin, 1968): Sensory memory (brief, capacity limited by senses) -> Short-term memory (limited capacity 7+/-2 items, duration ~30 seconds) -> Long-term memory (potentially unlimited capacity and duration) via rehearsal.
Key Fact: Types of LTM: Episodic (personal experiences, e.g. your first day at school), Semantic (facts and knowledge, e.g. Paris is the capital of France), Procedural (skills and actions, e.g. riding a bike).
Key Fact: Eyewitness testimony is unreliable: Loftus & Palmer (1974) showed leading questions distort recall - participants estimated faster speeds when verbs like 'smashed' were used. Anxiety, weapon focus and post-event discussion also reduce accuracy.
Key Fact: Improving memory: elaborative rehearsal (linking new info to existing knowledge), chunking (grouping items), and mnemonic devices enhance encoding and retrieval.
📋 Key Vocabulary and Concepts
For Memory, you must know:
- Encoding
- Storage
- Retrieval
- Sensory memory
- Short-term memory (STM)
- Long-term memory (LTM)
- Multi-store model
- Rehearsal
- Episodic memory
- Semantic memory
- Procedural memory
- Eyewitness testimony
- Leading question
- Reconstructive memory
❓ Practice Questions
Q1: Describe the multi-store model of memory and evaluate its strengths and limitations.
Q2: Explain how leading questions can affect the accuracy of eyewitness testimony, referring to Loftus & Palmer's research.
Q3: Compare and contrast episodic, semantic and procedural long-term memory.
✅ Answers
- The MSM provides a clear, testable framework: evidence supports the distinction between STM and LTM (case of HM, primacy-recency effect). Limitations: it oversimplifies memory - STM and LTM are not unitary stores (WMM shows STM has multiple components); rehearsal is not the only way to transfer to LTM (flashbulb memories).
- Loftus & Palmer showed verb manipulation ('smashed' vs 'hit') changed speed estimates by up to 10 mph. This demonstrates that leading questions alter memory through response bias or actual memory distortion. However, real-world eyewitness testimony may be more accurate than lab studies due to higher anxiety and real consequences.
- Episodic: personal events, time-stamped, consciously recalled. Semantic: general facts, not time-stamped, consciously recalled. Procedural: skills/habits, not consciously recalled. All three are distinct LTM types with different brain regions.
🎯 Exam Tips
- STM has a capacity of 7+/-2 items and a duration of about 30 seconds.
- Eyewitness testimony is unreliable - always mention Loftus & Palmer when discussing EWT.
- Episodic = events you experienced. Semantic = facts you know. Procedural = things you can do.
📝 Exam Technique
Psychology Exam Tips:
When evaluating memory research, use the GRAVE framework: Generalisability, Reliability, Applications, Validity, Ethics. Always compare lab studies (high control, low ecological validity) with real-world studies (high ecological validity, less control).
When evaluating memory research, use the GRAVE framework: Generalisability, Reliability, Applications, Validity, Ethics. Always compare lab studies (high control, low ecological validity) with real-world studies (high ecological validity, less control).
⚠️ Common Errors
Watch Out!
Students often make mistakes here. Wrong: The multi-store model fully explains how memory works because it shows information flows from sensory to short-term to long-term memory. Correct: While the MSM describes a basic flow of information, it fails to account for: working memory (Baddeley & Hitch showed STM has multiple components), different types of LTM (episodic, semantic, procedural), and the fact that some memories form without conscious rehearsal (e.g. flashbulb memories). The model is a useful starting point but is oversimplified.
✍️ Model Answer
Full-Mark Response
Evaluate the usefulness of the multi-store model of memory for understanding how we remember and forget.
A grade 9 response will: outline the MSM with evidence (case of HM supports STM/LTM distinction, primacy-recency effect); evaluate strengths (clear framework, testable predictions, supported by brain scanning); evaluate limitations (oversimplifies STM and LTM, ignores working memory, doesn't explain procedural memory); conclude: the MSM was foundational and is supported by key evidence, but it is now considered an incomplete explanation - the Working Memory Model and LTM subtypes offer more comprehensive accounts of specific memory processes.
📊 AO Deep Dive
Assessment Objective Focus: Memory
AO1 — Knowledge: Demonstrate knowledge of Memory including key definitions, research studies and psychological terminology.
AO2 — Application: Apply your understanding of Memory to real-world scenarios and given contexts. Use research evidence to support your points.
AO3 — Analysis & Evaluation: Evaluate psychological theories and studies related to Memory, considering methodological strengths and weaknesses, and reaching a balanced conclusion.
📝 Exam Questions by Topic
🎬 Video Resources
Detailed Notes
Key Studies and Theories in Memory
Memory 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 memory, 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 memory 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 memory can be used to improve people’s lives, influence policy, or solve practical problems.
GCSE Example: Key Studies and Theories in Memory
When writing about a study related to memory, 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 Memory
Evaluation is a crucial skill in GCSE Psychology. When evaluating studies related to memory, 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 memory 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 memory 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 Memory
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 Memory to Real Life
GCSE Psychology requires you to apply psychological understanding of memory to everyday situations. Consider how the theories and studies you have learned about explain real behaviour: How does memory affect people in schools, workplaces, families and communities? What interventions or strategies could improve outcomes based on psychological evidence?
When applying memory 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 Memory to Real Life
A strong application answer: ‘Understanding of memory 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 memory and evaluate its methodology using the GRAVE method.
A: A key study in memory 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 memory could be applied to improve a real-life situation.
A: Understanding of memory 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.
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