"The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence." -- Nikola Tesla
When they first hear about EFT, some people ask whether EFT has been proven effective in scientific studies. It has, and for those who want to read the studies, they can find more than 100 papers published in peer-reviewed professional journals by visiting www.eftuniverse.com/research-studies/eft-research. Sometimes, however, the person's need for "scientific proof" arises out of a confusion between the scientific method and physical materialism.
The scientific method is the methodical study of observed phenomena and the advancement of theories to explain those phenomena. It is willing to look anywhere for answers. For it, studying energy psychology and the energy world is no stranger than studying the quarks, leptons, and bosons of quantum mechanics. Physical materialism, on the other hand, is a belief that the physical world is the one and only world. It says that there is nothing beyond the physical world, so don't even look.
This substitution of physical materialism for science is often what is taught in high school science classes, so it is very common among people who are not actually trained in the scientific method. They don't realize that they are confusing the scientific method with physical materialism or that they have made a religion of their belief in physical materialism -- a religion that forbids and condemns any scientific exploration beyond the physical world.
Physical materialism does give us a wonderful understanding of the physical world, but gets stumped beyond that. People who have been confusing it with "science" can open up their minds in two ways: they can read the validating research on EFT, and they can conduct some of their own research by experiencing EFT and noticing what happens in their own bodies during the process.
And after teaching EFT to hundreds of students and using it with hundreds of clients over the last 10 years, it seems to me that, whether their attitude at the start is trusting or suspicious, personal experience is what shows most people the value of EFT, anyway. There's no substitute for personal experience.