In One-Group Pretest-Posttest Design, Which of the Following Will Occur

question 21

Multiple Choice

In one-group pretest-posttest design, which of the following will occur whenever researchers gather a set of extreme scores taken at one time and compare them with scores taken at another point in time?

• A)Regression toward the mean
• B)Propensity score matching
• C)Selection differences
• D)Testing effects

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