I'd never hire that research team.
It's like the flat-Earthers, or those who believed we were the center of the universe. "We've done extensive investigation, and all evidence up until now says the Earth is flat and the center of the universe." Idiots. Of *course* by sifting through previous studies that have been criticised you're going to find a preponderance of "evidence" for exactly what's gone before. It's obvious. Was that ever in dispute? How about a study that throws everything out the window, including preconceptions, and actually starts doing trials and collating new empirical data?