Science Quiz / Types of Bias

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Can you name the Types of Bias

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Occurs when a researcher's belief in the efficacy of the Tx changes the outcome of the Tx
Occurs with 2 closely associated factors; the effect of 1 factor distorts or confuses the effect of the other
Early detection confused w/ increased survival; seen with improved screening
Subjects in different groups are not treated the same (more attention paid to Tx group, leading to greater compliance)
Subjects are not representative relative to general population; therefore results are not generalizable
Nonrandom assignments to study groups
Info gathered at an inappropriate time (using a surgery to study a fatal disease-only those patients alive will be able to answer survey)
Knowledge of presence of disorder alters recall by subjects
Occurs when the group being studied changes its behavior when they realize they are being studied

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Created Feb 10, 2014ReportNominate

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