To test the validity of experiments, research is used.
Research . It is used to establish or confirm facts , reaffirm the results of previous work , solve new or existing problems , support theorems , or develop new theories . To test the validity of instruments , procedures , or experiments , research may replicate elements of prior projects or the project as a whole . The primary purposes of basic research ( as opposed to applied research ) are documentation , discovery , interpretation , or the research and development ( R&D ) of methods and systems for the advancement of human knowledge .