obvious information that you have the wrong drug-for example, a label marked ephedrine instead of the expected epinephrine-may be ignored or misinterpreted to confirm your expectation that the drug is correct. 20 Although the danger of confirmatory bias is greatest when making decisions about diagnosis, ongoing treatment decisions are also affected.It is thus critical to remain constantly vigilant for any information that may contradict your existing diagnosis, and to give any such information careful consideration, rather than dismissing it as irrelevant.It is also a good idea to try to think of specific reasons why your current theory might be wrong and to ask questions that could potentially disprove your hypothesis.Always be aware of alternative hypotheses and ask yourself whether they may be better than your current ideas.
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Fred B Charatan (2005) studied this question.
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