Related Devices and Studies
Persinger and colleagues also developed a device nicknamed "The Octopus" which uses solenoids around the whole brain, in a circle just above subject's ears. Commercial versions of the God helmet, Octopus and associated devices are sold by Persinger’s research associate Todd Murphy, and he reports that his devices are able to modulate emotional states in addition to enhancing meditation and generating altered states. Experimental attempts to produce modulation of emotional states have found no difference in emotional state whether the device was on or off, although the researches conclude "additional investigations ... are warranted." Persinger and colleagues report significant changes in subjects' EEG during stimulation with a Shakti system. In one report by Persinger's lab, these changes were correlated with an out-of-body experience.
One published attempt to test Persinger's theories regarding the psychological effects of environmental magnetic fields, used whole-body exposure to magnetic fields and ultrasound in freely-moving participants to create a "haunted room" within which it was hoped subjects would sense a "presence." The study found that reports of unusual experiences were unrelated with the presence or absence of "complex" environmental electromagnetic fields similar to Persinger's. They concluded that the effects were likely due to suggestibility, though they did not directly measure it.
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