Definitions for "EXPERIMENTAL STUDY"
(Randomized controlled trial or randomized clinical trial) An experiment that uses random assignment to create treatment and control groups so that changes can be inferred or attributed to the experimental treatment.
A study in which the investigators determine and control the conditions of the experiment (see also interventional study).
A study in which the investigator specifies the exposure category for each individual (clinical trial) or community (community trial), then follows the individuals or community to detect the effects of the exposure.