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GCSE Psychology · key term
A change in performance caused by the sequence in which conditions are completed, such as practice, fatigue or boredom.
Used by AQA and OCR
Paper 1
Revise: Quantitative and Qualitative Research and Experimental DesignsA strength is that there are no order effects between conditions. Participants do not complete both conditions, so their performance cannot be affected by having already completed the other one. They are also less likely to work out the aim by comparing conditions, reducing the risk of demand characteristics.
Paper 1, Paper 2
A change in performance caused by the position of a condition in the sequence, such as improvement through practice or poorer performance through fatigue.
Counterbalancing spreads order effects across conditions; it does not stop participants becoming practised or tired.
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Repeated measures has a weakness: order effects. Performance may change because a condition comes first or second, rather than because of the IV.
