There is very little that the researchers understand about the phenomenon, but they do know that results arent affected by distance or time. Participants, for example, can have the same effect on a machine from outside the room or across the country. They can also have the same effect if they have the intention before the REG is turned on or even if they read a book or listen to music while the machine is running.
http://www.wired.com/news/technology/0,1282,68216,00.html
