The Greyson Near-Death Experience Scale
A Validated Scientific Measure of NDE Depth and Characteristics
Overview
The Greyson Near-Death Experience Scale was developed by psychiatrist Dr. Bruce Greyson and first published in 1983 in the Journal of Nervous and Mental Disease. It is the most widely used and scientifically validated instrument for measuring the depth and characteristics of near-death experiences (NDEs).
The scale was designed to provide a standardized, reliable, and clinically useful tool to:
- Differentiate NDEs from other types of experiences (e.g., hallucinations, dreams, delirium)
- Quantify the depth and intensity of an NDE
- Enable comparison across different NDE accounts in research
- Standardize NDE research methodology worldwide
Scale Structure
The scale consists of 16 items organized into four components, each containing four questions. Every question is scored on a 3-point scale:
| Score | Meaning |
|---|---|
| 0 | Not present |
| 1 | Moderately or ambiguously present |
| 2 | Definitely present |
The total score ranges from 0 to 32. Each component contributes a subscore of 0 to 8.
These items assess changes in thought processes and cognition during the experience.
| # | Question |
|---|---|
| 1 | Did time seem to speed up or slow down? |
| 2 | Were your thoughts speeded up? |
| 3 | Did scenes from your past come back to you? (Life review) |
| 4 | Did you suddenly seem to understand everything? |
These items assess emotional and feeling-based elements of the experience.
| # | Question |
|---|---|
| 5 | Did you have a feeling of peace or pleasantness? |
| 6 | Did you have a feeling of joy? |
| 7 | Did you feel a sense of harmony or unity with the universe? |
| 8 | Did you see or feel surrounded by a brilliant light? |
These items assess perception and awareness that extends beyond normal sensory experience.
| # | Question |
|---|---|
| 9 | Were your senses more vivid than usual? |
| 10 | Did you seem to be aware of things going on elsewhere, as if by ESP? |
| 11 | Did scenes from the future come to you? (Precognitive visions) |
| 12 | Did you feel separated from your body? (Out-of-body experience) |
These items assess encounters and environments that transcend ordinary reality.
| # | Question |
|---|---|
| 13 | Did you seem to enter some other, unearthly world? |
| 14 | Did you seem to encounter a mystical being or presence, or hear an unidentifiable voice? |
| 15 | Did you see deceased or religious spirits? |
| 16 | Did you come to a border or point of no return? |
Scoring and Interpretation
A total score of 7 or higher is generally accepted as indicative of a genuine near-death experience for research purposes. The total score further classifies the depth of the experience:
| Score Range | Classification | Description |
|---|---|---|
| 0–6 | Not an NDE | The experience lacks sufficient NDE characteristics to be classified as one. |
| 7–12 | Mild NDE | Contains some NDE elements but at a lower intensity. The experiencer reported several characteristic features. |
| 13–20 | Moderate NDE | A significant NDE with multiple characteristic elements present. The experience was rich and multi-dimensional. |
| 21–32 | Deep NDE | A profound experience with most or all NDE elements present at high intensity. These are the most comprehensive NDEs. |
Reliability and Validity
The Greyson NDE Scale has demonstrated strong psychometric properties in multiple studies:
- Internal consistency: Cronbach's alpha of 0.88, indicating high reliability.
- Test-retest reliability: Pearson correlation of 0.92 when administered at different time points, demonstrating stability over time.
- Split-half reliability: High correlation between odd and even items.
- Discriminant validity: The scale successfully differentiates NDEs from other altered states of consciousness, including hallucinations, dreams, and delirium.
The scale has been translated into multiple languages and validated cross-culturally, making it the gold standard for NDE research worldwide.
How We Use the Greyson Scale
On this platform, we apply the Greyson NDE Scale to first-person NDE accounts shared through video. Our AI analysis system evaluates each of the 16 items based on the experiencer's own description, providing:
- A total score (0–32) with corresponding depth classification
- Individual item scores for each of the 16 questions
- Reasoning for each score, citing specific elements from the account
- A component breakdown showing the cognitive, affective, paranormal, and transcendental subscores
Note: Our AI-generated Greyson scores are approximations based on the video transcript and should be considered indicative rather than definitive. The original scale was designed for direct experiencer self-report.
Reference
Greyson, B. (1983). The Near-Death Experience Scale: Construction, reliability, and validity. Journal of Nervous and Mental Disease, 171(6), 369–375.