. 2022 Nov 23;9:720. doi: 10.1038/s41597-022-01822-4

Table 1.

Psychometric questionnaires and their factors and scales.

Questionnaire	Versions	Scales/Factors	Original publication
Altered States of Consciousness Rating Scale	APZ	(1) Oceanic Boundlessness, (2) Dread of Ego Dissolution, (3) Visionary Restructuralization	Dittrich, 1975¹⁹, 1985²⁰, 1998²
	5D-ASC	(1) Oceanic Boundlessness, (2) Dread of Ego Dissolution, (3) Visionary Restructuralization, (4) Auditory Alterations, (5) Vigilance Reduction	Bodmer et al.²¹ Dittrich et al.²²
	11-ASC	(1) Experience of Unity, (2) Spiritual Experience, (3) Blissful State, (4) Insightfulness, (5) Disembodiment, (6) Impaired Control and Cognition, (7) Anxiety, (8) Complex Imagery, (9) Elementary Imagery, (10) Audio-Visual Synesthesia, (11) Changed Meaning of Percepts	Studerus et al.³
Phenomenology of Consciousness Inventory	PCI	(1) Positive Affect, (a.) Joy, (b.) Sexual Excitement, (c.) Love, (2) Negative Affect, (a.) Anger, (b.) Sadness, (c.) Fear, (3) Altered Experience, (a.) Altered Body Image, (b.) Altered Time Sense, (c.) Altered Perception, (d.) Altered Meaning, (4) Visual Imagery, (a.) Amount, (b.) Vividness, (5) Attention, (a.) Direction, (b.) Absorption, (6) Self Awareness, (7) Altered State of Awareness, (8) Internal Dialogue, (9) Rationality, (10) Volitional Control, (11) Memory, (12) Arousal	Pekala,1991²³; Pekala R. J. and Levine R. L²⁴.
Hallucinogen Rating Scale	HRS	(1) Somaesthesia, (2) Affect, (3) Perception, (4) Cognition, (5) Volition, (6) Intensity	Strassman et al.²⁵
Mystical Experience Questionnaire	MEQ30	(1) Mystical, (2) Positive Mood, (3) Transcendence of time and space, (4) Ineffability	Pahnke, 1963²⁶, 1966²⁷; MacLean et al.²⁸