Randomized experiments come the closest to establishing cause and effect relationships.
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Q2: Random selection enhances the representativeness of a
Q3: An operational definition of a behavior refers
Q4: Interobserver reliability of a measured behavior refers
Q5: The term external validity refers to the
Q6: The general purpose of a descriptive study
Q8: If a researcher obtained a Pearson r
Q9: A Pearson r correlation coefficient of +.44
Q10: In the experiment, the purpose of random
Q11: Efforts to increase internal validity may decrease
Q12: A weakness of single-subject reversal designs is
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