The nurse researcher believes that random assignment to the study's groups is impossible and has elected to use currently existing groups as study subjects. Because of this decision, which study designs will this nurse researcher choose from for this study? Standard Text: Select all that apply.
1. Nonequivalent control group design
2. Pretest-posttest control group design
3. One-group pretest-posttest design
4. Time-series design
5. Solomon four-group design
Question 2
The nurse researcher's study design includes an experimental group and a control group. After the study begins, the researcher finds that 60 percent of the experimental group and 75 percent of the control group have dropped out of the study. Because of the internal threat of mortality, the researcher abandons the study. In future studies, what could the researcher do to help prevent this problem?
1. Have the participants sign a pledge to continue in the project prior to inclusion in the study group.
2. Call each of the participants who dropped out and insist that each honors his or her commitment to the study.
3. Allow a longer time for the study.
4. Try to establish a relationship with the participants.
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Opener A researcher examines an agarose gel