Examlex
By the end of the revolutionary period 1776 - 1848,
Sampling Bias
A statistical bias that occurs when a sample is collected in such a way that some members of the intended population are less likely to be included than others, resulting in a non-representative sample.
Double Blind Procedure
A double-blind procedure is a research method in which both the participants and the researchers are unaware of who has been assigned to the control or experimental group, reducing bias.
Placebo Effect
A phenomenon wherein a patient's symptoms can improve after receiving a treatment with no therapeutic value, purely because of the individual's belief in the treatment's efficacy.
Experimenter Bias
A type of research bias where the expectations or preferences of the researcher influence the outcomes of the study.
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