Examlex
Who made the first known correlation between environmental agents and cancer development?
Experimenter Bias
A process where the researchers' expectations inadvertently influence the outcome of a study.
Random
Lacking any definite plan or order or purpose; governed by chance.
Ineffectual Treatment
Medical or therapeutic interventions that fail to produce the desired beneficial outcome.
Manipulated Variable
In experimental research, the manipulated variable is the factor that is intentionally changed or controlled by the researcher to observe its effects on the dependent variable.
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