V zadnjih nekaj desetletjih se je iskanje in analiziranje podatkov o učinkovitih ali neučinkovitih postopkih, metodah in tehnikah bistveno izboljšalo in danes je za veliko večino mogoče hitro preveriti, ali so v skladu z zadnjimi znanstvenimi spoznanji ali ne.
During the past several decades research into and analysis of the efficiency of various methods have been radically improved, so today most methods may be quickly assessed against scientific evidence.