Hypotheses, Variables and Control
Operationalise variables, write null and alternative hypotheses, and control extraneous influences.
How to study for GCSE Psychology
Confirm the exact board route, connect theories to prescribed studies, apply mechanisms to unfamiliar contexts, evaluate evidence and practise the current paper design.
Core concepts
Concept 1
hypotheses
Exam cue: Turn an aim into measurable variables, identify independent and dependent variables where appropriate, and write a testable alternative and null hypothesis.
Concept 2
operational variables
Exam cue: Explain how a plausible extraneous variable could systematically affect the outcome and select a control that preserves validity.
Concept 3
extraneous-variable control
Exam cue: Match the hypothesis and variable language to the proposed design; correlation questions use co-variables rather than manipulated independent variables.
Targeted study blocks
Common psychology core
Build the transferable conceptual model
Turn an aim into measurable variables, identify independent and dependent variables where appropriate, and write a testable alternative and null hypothesis.
Evidence and application
Connect claims to method, findings and context
Explain how a plausible extraneous variable could systematically affect the outcome and select a control that preserves validity.
Current-route boundary
Apply only the live specification detail
Match the hypothesis and variable language to the proposed design; correlation questions use co-variables rather than manipulated independent variables.
Risk pitfalls and guardrails
Writing a directional claim when the evidence or prompt supports only a non-directional hypothesis.
Guardrail: Do not mix board routes, treat one study as proof, diagnose a person or append evaluation that does not change the answer to the question.
Describing a theory or study without applying, analysing or evaluating it when the command requires more.
Guardrail: Do not mix board routes, treat one study as proof, diagnose a person or append evaluation that does not change the answer to the question.
Importing a named theory, core study, diagnosis rule or paper convention from another specification.
Guardrail: Do not mix board routes, treat one study as proof, diagnose a person or append evaluation that does not change the answer to the question.
Memory anchors
Operationalisation
Defining a variable in observable or measurable terms.
Alternative hypothesis
A testable prediction that a difference, relationship or effect exists.
Null hypothesis
A prediction that no difference or relationship beyond chance exists in the defined measures.
Hypotheses, Variables and Control: evidence check
Explain how a plausible extraneous variable could systematically affect the outcome and select a control that preserves validity.
Hypotheses, Variables and Control: route check
Match the hypothesis and variable language to the proposed design; correlation questions use co-variables rather than manipulated independent variables.
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 describes the purpose of a research aim?
What makes a research question testable?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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