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Systemic bias is any (generally) unintentional bias arising from constraints.
Examples of experimental systemic bias include observer bias, selection bias and diagnostic bias.
Here the nature or effectiveness of the diagnostic method varies with the variable under test. For example when diagnosing uterine cancer, a common technique for diagnosis has a higher effectiveness in those using oral contraceptives due to the increased probability of breakthrough bleeding.
Examples of personal systemic bias are cultural, notational and infrastructural.
The Systemic Bias of Wikipedia arises from constraints of this project.