The independent variables. For each, state whether it is active or attribute. The dependent variables. The specific design name (e.g., posttest-only control group design). If the approach is quasi-experimental, evaluate its strength."

"Health educators administering a large wellness program are interested in whether structured classes or support groups seem to have the greater influence on "healthy" attitudes toward food. Individuals voluntarily sign up for either the classes or the support groups. Their plan is to randomly select 30 participants from the classes and 30 from support groups and (with their permission) to administer an eating attitudes instrument as a pretest and as a posttest to assess change in attitudes over time. One of the health educators expressed the concern that taking the eating attitudes test prior to the course would have an effect on posttest scores because participants will already be familiar with items on the instrument and may attempt to provide the "socially desirable" response. Practice effects would be an issue. What could they do to address this?"

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