Examlex
You are conducting a survey on racism.You have a group of well-trained assistants,about half white,half African American.Should you keep track of which subjects are questioned by white assistants and which by African-Americans assistants?
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.
Researcher's Expectations
Preconceived beliefs or predictions about the outcome of a study, which can potentially influence the results unintentionally.
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