The APZ (Abnormal Mental States) questionnaire is one of the most widely used

psychometric Psychometrics is a field of study within psychology concerned with the theory and technique of measurement. Psychometrics generally refers to specialized fields within psychology and education devoted to testing, measurement, assessment, and ...

scales for assessing subjective experiences of

altered states of consciousness An altered state of consciousness (ASC), also called altered state of mind or mind alteration, is any condition which is significantly different from a normal waking state. By 1892, the expression was in use in relation to hypnosis, though there ...

. First published in 1998 by Adolf Dittrich, the APZ questionnaire comprises three dimensions: "Oceanic Boundlessness (OSE)", "Dread of Ego Dissolution (AIA)" and "Visionary Restructuralization (VUS)".Dittrich, A. (1998). The standardized psychometric assessment of altered states of consciousness (ASCs) in humans. Pharmacopsychiatry, 31(S 2), 80-84. According to Google Scholar, it has been cited at least 269 times.

Notes

Psychological tests and scales Consciousness studies Mental states Hallucinations Psychedelia {{Psych-stub