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You should select a broad subject area that is:
Independent Variable
The variable in an experiment that is manipulated to observe its effect on the dependent variable.
Dependent Variable
The variable in experimental research that is measured to assess any changes in response to the manipulation of the independent variable.
Random Assignment
A method used in experiments where participants are allocated to various groups in a way that ensures each has an equal chance of being chosen, to ensure fairness and objectivity in the results.
Experimental Conditions
The controlled environments and variables manipulated by researchers to investigate causal relationships in a study.
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