Examlex
Which one of the following factors would NOT influence the productivity of an ocean community?
Control Group
A group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.
Masking
A method used in research where the participants and/or researchers are unaware of which individuals are in the control group and which are in the experimental group, to prevent bias.
Confounding
A situation in which the effect of two variables on a third is not clearly distinguishable.
Validity
The accuracy with which a study reflects the true situation.
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