Which of the Following Is a Disadvantage of the One-Group

question 7

Multiple Choice

Which of the following is a disadvantage of the one-group pretest-posttest uninterpretable design?

• A) The lack of information about any possible difference in the groups that exist before treatment makes it difficult to attribute results to the treatment.
• B) The lack of a comparison group makes it impossible to rule out threats to internal validity.
• C) The lack of random assignment of participants to groups allows the possibility that the groups may have differed along a number of important dimensions.
• D) The lack of a control group makes it impossible to determine-after comparing pretest-posttest observations-if a change has occurred.

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