Sampling, Ethics, Piloting and Scientific Reporting
Recruit an appropriate sample, protect participants, pilot procedures and communicate research transparently for scrutiny and replication.
How to study A-level Psychology
For every claim, identify the mechanism, supporting evidence, method, alternative explanation, practical implication and justified conclusion.
Core concepts
Concept 1
Random, systematic, stratified, opportunity and volunteer sampling differ in feasibility and exposure to sampling bias.
Exam cue: Describe exactly how the sample would be drawn from the target population.
Concept 2
Informed consent, withdrawal, protection from harm, privacy, confidentiality, deception and debriefing require context-sensitive ethical management.
Exam cue: Balance the scientific value of a procedure against a specific ethical cost and safeguard.
Concept 3
Pilot work, standardised instructions, peer review, report sections and transparent referencing support quality control and replication.
Exam cue: Place aims, method, results, interpretation and references in the correct reporting logic.
Targeted study blocks
Multi-board knowledge
Secure the shared psychological core
Secure sampling procedures, ethical principles, pilot logic and scientific communication; practical investigations are learned through the course but the qualification remains externally examined.
Scientific reasoning
Use evidence before reaching a judgement
Judge representativeness and ethical proportionality separately, then explain how transparent reporting permits replication, criticism and correction.
Risk pitfalls and guardrails
Calling a sample random because participants were chosen casually.
Guardrail: Do not memorise a study as an isolated story or assume that one board's named research and option choices apply nationally.
Assuming debriefing automatically removes every effect of deception or distress.
Guardrail: Do not memorise a study as an isolated story or assume that one board's named research and option choices apply nationally.
Treating peer review as proof that a conclusion is permanently correct.
Guardrail: Do not memorise a study as an isolated story or assume that one board's named research and option choices apply nationally.
Memory anchors
Target population
The target population is the wider group to which researchers hope to generalise.
Stratified sample
A stratified sample represents relevant subgroups in their population proportions.
Informed consent
Participants agree after receiving information needed for an autonomous decision.
Pilot study
A pilot is a small preliminary run used to detect procedural problems.
Peer review
Experts scrutinise methods, reasoning and contribution before or after publication.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is the target population?
Why is a sampling frame needed for simple random sampling?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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