<prompt> Translate the following text to EnglishHii ni tofauti kubwa na mbinu nyingine za tathmini, ambapo vikundi vya kudhibiti na kulinganisha hutumiwa kwa kuondoa sababu nyingine za ugunduzi na kuanzisha sifa ya uhakika.  <response>: This is in considerable contrast to other evaluation methods, where control and comparison groups are used subtractively to rule out other reasons for a finding and establish firm attribution. 