Why are experimental studies difficult to conduct

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Reference no: EM133990859

Questions

1. Why are experimental studies difficult to conduct?

2. Indicate whether the following statements are true or false:

A. A major advantage of a randomized experimental study is that it rules out self-selection of subjects to the treatment and comparison groups.

B. Randomization controls for confounding equally well in both large and small studies.

C. Noncompliance in an experimental study makes the compared groups more similar, which reduces the ability of the investigator to detect a difference between the groups.

D. An important advantage of a placebo-controlled experimental study is that it permits masking of study subjects and study investigators.

E. Randomization and random selection are alternative terms for the same concept.

F. Some experimental studies are terminated earlier than planned because of a shift in equipoise.

Reference no: EM133990859

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