Clinical research: External validity Vs. Internal validityCreated by:
The ultimate purpose of a clinical research is to draw inferences form the result of the particular study, about the nature of universe around it. By doing a clinical research, we hope that the truth in the clinical study will infer the truth in the universe. There are 2 factors involved in this which are the internal validity and external validity of the study. Internal validity means that the degree of the investigators draws correct result from what was actually occured in the clinical study. External Validity means the degree of those conclusion from the clincial study, can be applied to the universe/ people outside the study.There are a few errors that could be happened, and the goal is to maximize the validity of inferences of the study to generalise population. Is anyone who is familiar in designing clinical research would like to give some in-sight with regards to striking the balance between internal and external validity???