The Main Internal Validity Problem of the Static-Group Comparison Design

question 42

Multiple Choice

The main internal validity problem of the static-group comparison design is

• A) observed posttest differences may be due to preexperimental differences between the groups rather than to the experimental treatment.
• B) the interaction between the experimental and control treatments.
• C) the pretest may sensitize subjects to the experimental treatment.
• D) the matching procedure may result in the loss of too many subjects and thus introduce bias.

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