In the nonequivalent control-group design,
A) the more similar the natural groups are to each other, the more confidence we can have in causal conclusions.
B) the more dissimilar the natural groups are, the more confidence we can have in causal conclusions.
C) the natural groups must be tested to assure equivalence on the dependent measure.
D) the natural groups must be tested to assure equivalence on the independent variable.
Answer: A
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Fill in the blank(s) with the appropriate word(s).
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