“…Over the years, the PCI has been found to be reliable and valid for mapping phenomenological experiences in response to such stimulus conditions as eyes open and closed sitting quietly, breathing, progressive relaxation, hypnotism, drumming and trance postures, and fire walking (Forbes & Pekala, 1993Maurer, Kumar, Woodside, & Pekala, 1997;Pekala & Ersek, 1992/1993Pekala & Levine, 1981Pekala, Steinberg, & Kumar, 1986;Pekala & Wenger, 1983;. Over the last 2 decades, Pekala and colleagues (Kumar & Pekala, 1988Kumar, Pekala, & Cummings, 1996;Kumar, Pekala, & Marcano, 1996;Kumar, Pekala, & McCloskey, 1999;Pekala, 1991aPekala, , 2002Pekala & Kumar, 1984, 1987Pekala, Kumar, & Marcano, 1995;Pekala & Levine, 1981 have used this approach to assess and quantify states and altered states of consciousness.…”