Whether the phenomenon is of any interest psychologically (imo) hinges on the question of whether Reality Shifters are in a sleeping state during the activity o

Whether the phenomenon is of any interest psychologically (imo) hinges on the question of whether Reality Shifters are in a sleeping state during the activity or not (of course it's interesting socially that it's such a big trend in either case). In the section where they compare to Lucid Dreaming it sounds identical to my mind (aside from certain trends in preferences for how the LD is set up—but a new trend in preferences for LD induction techniques is hardly headline-worthy). Did I miss it or have they done any measurement of brain activity of reality shifters doing their thing?