Question

Which of the following types of studies require approval by an internal review board?

1) Observational studies
2) Experimental studies
3) Both observational and experimental studies
4) None of the above

Answer 1

Both observational and experimental studies require approval by an internal review board.

Step-by-step explanation:

Both observational and experimental studies require approval by an internal review board.

In an observational study, the researcher measures characteristics in a sample but does not manipulate variables of interest. Examples of observational studies include cross-sectional, case-control, and cohort studies.

Experimental studies involve manipulating variables of interest to determine cause-and-effect relationships. These studies often require the use of control groups and random assignment.