The best forms of changes in experiments that contribute to strong validation is:
Internal Validity. Internal validity investigates whether the study design, methodology, and analysis provide unbiased answers to the research questions
An experiment is a technique that is carried out to support or deny a hypothesis, or to test the efficacy or probability of something that has never been done before.
Experiments shed light on cause-and-effect relationships by revealing what happens when a certain element is changed.
The following are various types of validity:
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