Altered states of Ganzfeld: A systematic review
A systematic review of controlled trials on the Ganzfeld experiment, which uses dim light and static sound to create a uniform perceptual field, found that only four such studies were conducted between 2000 and 2022. The review confirms that alpha brainwave interactions are involved in hallucination-like imagery during Ganzfeld stimulation. The authors highlight a significant gap in research on Ganzfeld-induced altered states of consciousness.