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GCSE Psychology · key term
An inactive treatment used for comparison with an active treatment, helping researchers separate drug effects from effects of expecting treatment.
Used by OCR
Paper 1
Revise: Daniel et al. (1991): Cerebral Blood Flow in SchizophreniaThe hypothesis was that patients receiving dextroamphetamine would have a higher ratio of prefrontal to non-frontal blood flow during the WCST than when receiving a placebo. This relative comparison mattered: task-related activity could become more concentrated in the prefrontal cortex without blood flow increasing throughout the brain.
Identify the IV as dextroamphetamine versus placebo, not the participants’ diagnosis. All participants had chronic schizophrenia.
Remember that participants continued their stabilised haloperidol treatment: the placebo condition was not an entirely unmedicated condition.
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