The God Helmet uses low-intensity magnetic fields. Some academics (psychologists, not neuroscientists) have claimed that the fields aren’t strong enough to influence the brain. In fact, there have been many experiments that found significant effects in the brain using weak magnetic fields. Here’s a link to a page that reviews some of these studies. The magnetic fields Dr. M.A. Persinger uses with the God Helmet are strong enough to do the job. In fact, some researchers use fields that are even weaker, but their work, unrelated to religion, isn’t controversial, so it gets less attention. Sometimes, “less is more”. It seems the critics who mistakenly claimed that only very strong magnetic fields can influence the brain (like those used in TMS) simply hadn’t done their homework. In fact, the mechanism where low-intensity magnetic fields affect the brain has been known for over twenty years. Link.