Editing Recall bias (section)

== Prevention ==
To minimize recall bias, some clinical trials have adopted a "wash out period", i.e., a substantial time period that must elapse between the subject's first observation and their subsequent observation of the same event.<ref>{{cite journal | doi = 10.1097/PAS.0000000000000948 | title = Whole slide imaging versus microscopy for primary diagnosis in surgical pathology: a multicenter randomized blinded noninferiority study of 1992 cases (pivotal study). | journal = American Journal of Surgical Pathology | volume = 42 | issue = 1 | year = 2017 | last1 = Mukhopadhyay | first1 = Sanjay | last2 = Feldman | first2 = Michael | last3 = Abels | first3 = Esther|pmid=28961557 | pmc=5737464 | pages=39–52}}</ref> Use of hospital records rather than patient experience can also help to avoid recall bias.<ref>{{Citation|last1=Lee|first1=William|title=10 - Critical appraisal: Reviewing scientific evidence and reading academic papers|date=2012-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780702033971000100|work=Core Psychiatry (Third Edition)|pages=131–142|editor-last=Wright|editor-first=Pádraig|place=Oxford|publisher=W.B. Saunders|language=en|doi=10.1016/b978-0-7020-3397-1.00010-0|isbn=978-0-7020-3397-1|access-date=2020-10-21|last2=Hotopf|first2=Matthew|editor2-last=Stern|editor2-first=Julian|editor3-last=Phelan|editor3-first=Michael|url-access=subscription}}</ref> Standardising sampling methods can help to avoid needing recall information in the first place.<ref name=":0">{{Citation|last1=Torelli|first1=Paola|title=Chapter 10 - Headache diaries and calendars|date=2010-01-01|url=http://www.sciencedirect.com/science/article/pii/S0072975210970103|journal=Handbook of Clinical Neurology|volume=97|pages=137–146|editor-last=Aminoff|editor-first=Michael J.|series=Headache|publisher=Elsevier|language=en|doi=10.1016/s0072-9752(10)97010-3|access-date=2020-10-21|last2=Jensen|first2=Rigmor|pmid=20816416 |isbn=9780444521392 |editor2-last=Boller|editor2-first=François|editor3-last=Swaab|editor3-first=Dick F.|url-access=subscription}}</ref>

Often, recall bias is difficult to avoid, and many studies change experiment design to avoid recalling information.<ref name=":0" />