One way to control the effects of extraneous variables is to randomize their effects across treatment groups.
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Q83: The value of a dependent variable is
Q84: Subjects in the control group are not
Q85: Subjects in the experimental group are exposed
Q86: The goal of correlational research is to
Q87: Control over extraneous variables is an important
Q89: Random assignment of subjects to treatment conditions
Q90: The term "internal validity" refers to the
Q91: A requirement of laboratory research is that
Q92: Sometimes, steps taken to ensure high levels
Q93: A threat to internal validity comes in
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