The goal of correlational research is to systematically manipulate extraneous variables and look for related changes in the dependent variable.
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Q81: Causal relationships can be clearly established only
Q82: The value of an independent variable is
Q83: The value of a dependent variable is
Q84: Subjects in the control group are not
Q85: Subjects in the experimental group are exposed
Q87: Control over extraneous variables is an important
Q88: One way to control the effects of
Q89: Random assignment of subjects to treatment conditions
Q90: The term "internal validity" refers to the
Q91: A requirement of laboratory research is that
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