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
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This note was uploaded on 04/07/2008 for the course STAT 110 taught by Professor Johnson during the Fall '07 term at South Carolina.

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

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