APZ questionnaire

The APZ (Abnormal Mental States) questionnaire is one of the most widely used psychometric scales for assessing subjective experiences of altered states of consciousness.^[1] 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)".^[2] According to Google Scholar, it has been cited at least 269 times.

Notes

^ Studerus, E., Gamma, A., & Vollenweider, F. X. (2010). Psychometric evaluation of the altered states of consciousness rating scale (OAV). PLOS ONE, 5(8), e12412. doi:10.1371/journal.pone.0012412
^ Dittrich, A. (1998). The standardized psychometric assessment of altered states of consciousness (ASCs) in humans. Pharmacopsychiatry, 31(S 2), 80-84.

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[1] Studerus, E., Gamma, A., & Vollenweider, F. X. (2010). Psychometric evaluation of the altered states of consciousness rating scale (OAV). PLOS ONE, 5(8), e12412. doi:10.1371/journal.pone.0012412

[2] Dittrich, A. (1998). The standardized psychometric assessment of altered states of consciousness (ASCs) in humans. Pharmacopsychiatry, 31(S 2), 80-84.

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