... The comprehensive measurement of conscious experience with assessment instruments has been a rare topic in psychological research, perhaps because psychologists could not find a method to reach a satisfactory level of significance of the results (Natsoulas, 1992;Petitmengin, 2009). Yet, there are many assessment instruments that have been in use for some time, with good results in evaluating various facets of the conscious experience; for example, Self-Consciousness Scale (Fenigstein et al., 1975), Psychological Well-Being Scales (Ryff and Keyes, 1995), The Phenomenology of Consciousness Inventory (Pekala, 1982), Mindfulness Attention and Awareness Scale-MAAS (Brown and Ryan, 2003), Freiburg Mindfulness Inventory (Walach et al., 2001, Toronto Mindfulness Scale (Bishop et al., 2004), Kentucky Inventory of Mindfulness Scale (Baer et al., 2004), Revised NEO Personality Inventory (Costa and McCrae, 1992), Emotional Quotient Inventory (Bar-On, 1997), Self-Compassion Scale (Neff, 2003), Multidimensional Assessment of Interoceptive Awareness (Mehling et al., 2012), Mystical Experience Questionnaire (MacLean et al., 2012), Leadership Maturity Assessment Instrument and Loevinger's Washington University Sentence Completion Test (Cook-Greuter, 2000), Troyer Level of Consciousness Inventory (Troyer, 2012), and various transpersonal psychology scales (MacDonald and Friedman, 2002). ...