Aims, Hypotheses, Variables and Operationalisation
Turn a psychological question into a testable prediction with measurable variables and an appropriate null or alternative hypothesis.
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
An aim states the purpose of an investigation, while a hypothesis predicts a relationship or difference that can be tested.
Exam cue: Identify the population, variables, predicted direction and exact operational measures.
Concept 2
Operationalisation defines how an abstract construct is manipulated, measured or classified so that the procedure can be replicated.
Exam cue: Use a directional hypothesis only when theory or evidence justifies the predicted direction.
Concept 3
Independent, dependent, extraneous and confounding variables have different roles in the logic and validity of an inference.
Exam cue: Explain how an uncontrolled factor could systematically change the dependent variable.
Targeted study blocks
Multi-board knowledge
Secure the shared psychological core
Learn the shared language of aims, directional and non-directional hypotheses, variables and operational definitions before comparing particular board examples.
Scientific reasoning
Use evidence before reaching a judgement
Judge whether the stated variables and measures genuinely test the psychological claim and whether an alternative explanation remains.
Risk pitfalls and guardrails
Writing a broad research question instead of a testable hypothesis.
Guardrail: Do not memorise a study as an isolated story or assume that one board's named research and option choices apply nationally.
Naming a construct such as anxiety without stating how it is measured.
Guardrail: Do not memorise a study as an isolated story or assume that one board's named research and option choices apply nationally.
Calling every unwanted variable a confound without showing that it varied with the independent variable.
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
Aim
The aim states what the investigation intends to discover.
Alternative hypothesis
An alternative hypothesis predicts a difference, association or effect.
Null hypothesis
A null hypothesis states that any observed pattern is due to chance.
Operationalisation
Operationalisation turns a construct into a specific measurable or manipulable variable.
Confounding variable
A confound varies systematically with the independent variable and offers an alternative explanation.
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
Which statement is an aim rather than a hypothesis?
A prior theory predicts that rehearsal improves recall. Which hypothesis is appropriately directional?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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