Answer :
Final answer:
Experimental design involves manipulating the independent variable to observe its impact on the dependent variable over time.
Explanation:
Experimental design: refers to the structure of an experiment that allows researchers to test hypotheses by manipulating the independent variable to observe its effect on the dependent variable.
Longitudinal study: involves tracking and observing the same subjects over an extended period to study changes or relationships over time.
Independent variable: the variable manipulated by researchers to observe its effect on the dependent variable, representing the hypothesized cause.
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