Examlex
Explain the relationships that appear to reduce tadpole abundance when insecticide is present, even though insecticide does not directly affect tadpoles.
Experimental
Pertaining to a method of research that involves the manipulation of variables to establish cause and effect relationships.
Correlational
Relating to a statistical relationship between two or more variables, where changes in one variable are associated with changes in another, without implying causation.
Confounding Results
Outcomes in research that cannot be accurately attributed to the variables under examination because of the influence of extraneous variables.
Independent Variable
A variable that is manipulated in an experiment to investigate its effect on a dependent variable.
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