to double the effect of an original stimuli (seeing, smelling, hearing) the stimuli must be increased by more than 100% e.g. for a newspaper ad to be perceived as double in size by the audience it must be increased by 4 times the original size; get it??
WEBER'S LAW
Meaning of WEBER'S LAW in English
Raynet Business and Marketing English glossary. Английский глоссарий компании Raynet Business and Marketing . 2012