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Chap6_sv - Ways to control for bias of people in...

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1 Chapter 6 Experiments in the Real World Ways to control for bias of people in experiments. Single Blind : An experiment is single blind if the units are _________ of the exact treatment being imposed on them. Controls for subject bias. Double Blind : An experiment is double blind if the ________ and the _________ are unaware of the exact treatment being imposed. Controls for subject and experimenter bias. Example of a Double Blind Experiment In cold studies, the doctors in charge label the treatments with a code number (such as #90210). Patients receive a treatment labeled with a code number. The nurses who give the treatments and record the responses know the treatment by its code number. Neither the nurse nor the patients know if the treatment being imposed is an experimental drug or a placebo. Example: Taste Test If everyone in class was given two snack bags labeled A and B. One contains a name brand product and the other a store brand Each student would use a random number
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