The Near-Death Experience Scale: Construction, Reliability, and Validity
📄 Original study📌 Appears in:
Plain English Summary
Before this 1983 study, there was no standardized way to measure near-death experiences. Greyson changed that by building the first proper yardstick: a 16-question scale whittled from 80 possible NDE features. It captures four flavors — thinking-related, emotional, paranormal, and transcendental — with impressively strong reliability scores across the board. A simple cutoff correctly flagged about 84% of people who reported having an NDE, and the scale could distinguish genuine NDEs from brain-disorder symptoms or ordinary stress responses. This tool became the bedrock of rigorous NDE research.
Actual Paper Abstract
Near-death experiences (NDEs) have been described consistently since antiquity and more rigorously in recent years. Investigation into their mechanisms and effects has been impeded by the lack of quantitative measures of the NDE and its components. From an initial pool of 80 manifestations characteristic of NDEs, a 33-item scaled-response preliminary questionnaire was developed, which was completed by knowledgeable subjects describing their 74 NDEs. Items with significant item-total score correlations that could be grouped into clinically meaningful clusters constituted the final 16-item NDE Scale. The scale was found to have high internal consistency, split-half reliability, and test-retest reliability; was highly correlated with Ring's Weighted Core Experience Index; and differentiated those who unequivocally claimed to have had NDEs from those with qualified or questionable claims. This reliable, valid, and easily administered scale is clinically useful in differentiating NDEs from organic brain syndromes and nonspecific stress responses, and can standardize further research into mechanisms and effects of NDEs.
Research Notes
Foundational measurement instrument for NDE research. First quantitative scale for NDEs with demonstrated reliability and validity. Enabled subsequent empirical NDE research. Highly cited in library papers. Essential for understanding operationalization of NDE construct across the collection.
Constructed and validated the 16-item Near-Death Experience Scale from an initial pool of 80 NDE manifestations. Administered 33-item preliminary questionnaire to 67 IANDS members describing 74 NDEs. Final scale comprises 4 components: Cognitive, Affective, Paranormal, and Transcendental. Scale showed high internal consistency (alpha = .88), split-half reliability (.92 corrected), test-retest reliability (.92 over 2-6 months), and strong criterion validity (r = .90 with Ring's WCEI). Cut-off score of 7 identified 83.8% of self-reported NDE experiencers. Scale differentiates NDEs from organic brain syndromes and nonspecific stress responses.
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- DMT Models the Near-Death Experience — Timmermann, Christopher (2018)
- Which Near-Death Experience Features Are Associated with Reduced Fear of Death? — Pehlivanova, Marieta (2022)
- Intensity and Memory Characteristics of Near-Death Experiences — Martial, Charlotte (2017)
- Incidence and Correlates of Near-Death Experiences in a Cardiac Care Unit — Greyson, Bruce (2003)
- Epistemological Implications of Near-Death Experiences and Other Non-Ordinary Mental Expressions: Moving Beyond the Concept of Altered State of Consciousness — Facco, Enrico (2015)
- Neuro-Functional Modeling of Near-Death Experiences in Contexts of Altered States of Consciousness — Romand, Raymond (2023)
- Near-Death Experience in Survivors of Cardiac Arrest: A Prospective Study in the Netherlands — van Lommel, Pim (2001)
- The Central Clinical Relevance of Near-Death Experiences in Acute Care Contexts — Michael, Pascal (2025)
- Temporality of Features in Near-Death Experience Narratives — Martial, Charlotte (2017)
- Explanation of Near-Death Experiences: A Systematic Analysis of Case Reports and Qualitative Research — Hashemi, Amirhossein (2023)
- Posttraumatic Stress Symptoms Following Near-Death Experiences — Greyson, Bruce (2001)
- AWAreness during REsuscitation - II: A Multi-Center Study of Consciousness and Awareness in Cardiac Arrest — Parnia, Sam (2023)
- Does the Arousal System Contribute to Near-Death and Out-of-Body Experiences? A Summary and Response — Long, Jeffrey (2007)
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📋 Cite this paper
Greyson, Bruce (1983). The Near-Death Experience Scale: Construction, Reliability, and Validity. The Journal of Nervous and Mental Disease.
@article{greyson_1983_nde_scale,
title = {The Near-Death Experience Scale: Construction, Reliability, and Validity},
author = {Greyson, Bruce},
year = {1983},
journal = {The Journal of Nervous and Mental Disease},
}