He also devised a 19 - item scale to assess experience of kundalini , the Physio - Kundalini Scale .
Greyson 's scale to measure the aspects of near - death experiences has been widely used , being cited 95 times as of early 2010 .
Greyson also devised a 19 - item scale to assess experience of kundalini , the Physio - Kundalini Scale .
Greyson 's scale to measure the aspects of near - death experiences has been widely used , being cited 95 times as of early 2010 .