- 1 How does experimental design relate to the level of evidence? Why do some experimental designs have a greater level of evidence than other experimental designs?
- 2 What is meant by the balance of internal validity and external validity when it comes to control of extraneous variables?
- 3 How does the research question or problem statement relate to research design?
- 4 How does the level of evidence regarding experimental design relate to the level of evidence sought in a review of the literature?
- 5 Why would patients want to enroll in a clinical trial?
- 6 What is the difference between random assignment and random selection?
