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: '''Double blind trials''' are used to prevent [[bias]] from affecting the results of a [[Clinical Trial|clinical trial]] when either the doctor or the patient expect the potential [[medicine]] to work or not.
: Many [[Alternative Medicine|alternative medicines]] appear to work until they are tested with a '''double blind trial''' showing that they are just a [[placebo]] and not a real [[medicine]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f246 ''Double blind trial, page 156, GCSE Biology; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Double blind trials, page 105, GCSE Biology; Third Edition, Oxford University Press, AQA '']