The more popular word used to replace will power is motivation. It appears that people feel they are able to change or increase their motivation while their will power is something they are born with. Does will power actually exist? Until recently there was no doubt that it existed. It isn't the THING that is in dispute but rather the term that is used to describe the thing. Ancient philosophers believed that will power was at the center of human personality. They believed that desire, reason and will were the cornerstone of human personality. Can will power be measured? BodyBlast Cleanse In order to answer how to increase your will power you first have to know if it can be measured. Science is based on research and qualitative or quantitative data. Before psychologists develop programs to change behavior they must see proof that it is possible through multiple case studies or randomized research studies. In a study conducted with 4-year-olds they attempted to measure what we are calling willpower.