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GCSE Psychology · key term
Assigning participants to experimental conditions by chance to reduce systematic differences between groups.
Used by AQA and OCR
Paper 1, Paper 2
Assigning participants to experimental conditions by chance to reduce researcher bias in allocation.
Assigning participants to experimental conditions using chance rather than the researcher’s judgement.
Random allocation assigns participants to conditions; random sampling selects participants from a population.
Do not confuse random allocation with random sampling: allocation decides which condition participants enter, whereas sampling selects who takes part.
Link study evaluation to specific details: random allocation reduces systematic participant differences, whereas self-reported depression scores may be affected by reporting bias.
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Assigning participants to study conditions by chance to reduce systematic differences between the groups.
Paper 1, Paper 2
Revise: Blackwell et al. (2007): Fixed and Growth MindsetsStudy 2 provided stronger evidence of a causal influence than Study 1 because it manipulated the teaching and used random allocation.
Assigning participants to experimental conditions using chance rather than the researcher's choice.
