Survival or Super-Psi

Braude (1992)

The essential conceptual starting point: if mediums produce accurate information, is it survival of consciousness or just very powerful ESP? This philosophical puzzle frames everything that follows.

The Near-Death Experience Scale: Construction, Reliability, and Validity

Greyson (1983)

The foundational measurement instrument: first quantitative scale for NDEs with demonstrated reliability (alpha=.88, test-retest r=.92) and validity (r=.90 with Ring's WCEI). All subsequent NDE research depends on this scale for operationalizing and measuring the phenomenon. Read here to understand how NDEs are quantified throughout this path.

Near-Death and Out-of-Body Experiences in the Blind: A Study of Apparent Eyeless Vision

Ring & Cooper (1997)

Opens an entirely new evidential line: interviews 31 blind respondents (14 blind from birth) and finds 80% report visual perceptions during NDEs/OBEs — including 64% of the congenitally blind. Two corroborative cases with independent witnesses. If people with no functional visual system report detailed sight during NDEs, conventional neurological explanations face a severe challenge. Read after Greyson's measurement tool to see the kind of evidence it was designed to capture.

Near-Death Experience in Survivors of Cardiac Arrest: A Prospective Study in the Netherlands

van Lommel et al. (2001)

Published in The Lancet

Published in The Lancet. A prospective study of 344 cardiac arrest survivors; 18% reported NDEs. The gold standard for NDE clinical research.

Stimulating illusory own-body perceptions

Blanke et al. (2002)

First demonstration that OBEs can be artificially induced by focal electrical stimulation: stimulating the right angular gyrus at 3.5 mA reproducibly triggered a full OBE in an epilepsy patient, with lower currents producing vestibular sensations. Established the temporo-parietal junction as the critical neural substrate for body-self integration, providing the strongest single piece of evidence for a neurological OBE mechanism. Read immediately after van Lommel to see the key neurological counter-evidence for the OBE component of NDEs.

Near-Death Experience, Consciousness, and the Brain

van Lommel (2006)

Van Lommel's follow-up review arguing that NDEs cannot be reduced to known brain mechanisms. Proposes a non-local model of consciousness.

Infrequent Near Death Experiences in Severe Brain Injury Survivors - A Quantitative and Qualitative Study

Hou, Huang, Prakash & Chaudhury (2013)

First prospective NDE study in severe traumatic brain injury patients (N=86, GCS<8, coma>72hrs): only 3.5% reported NDEs vs. 10-35% in cardiac arrest studies; notably, no out-of-body experiences were reported. Supports the 'dying brain' hypothesis -- NDEs may require specific neurophysiological dying processes absent in trauma-induced coma. Read after van Lommel to see critical negative evidence challenging NDE universality.

Surge of neurophysiological coherence and connectivity in the dying brain

Borjigin et al. (2013)

The neurophysiological backbone for the dying brain hypothesis: continuous EEG in 9 rats showed cardiac arrest triggers a ~30-second surge of globally coherent gamma oscillations with feedback connectivity 8× waking levels and cross-frequency coupling patterns consistent with conscious processing. First direct evidence that the dying mammalian brain can generate neural correlates of heightened consciousness. Read after Hou to see the mechanistic data behind the clinical observation.

Anomalous Information Reception by Research Mediums Demonstrated Using a Novel Triple-Blind Protocol

Beischel & Schwartz (2007)

A triple-blind mediumship study. If mediums can produce accurate, specific information under these controls, the super-psi vs. survival question sharpens.

Consistency of Near-Death Experience Accounts over Two Decades

Greyson (2007)

Tests whether NDE reports get embellished over time. Finds remarkable consistency, strengthening the case that NDEs reflect genuine experiences rather than confabulation.

Characteristics of Near-Death Experiences Memories as Compared to Real and Imagined Events Memories

Thonnard et al. (2013)

The first systematic application of memory science (MCQ) to NDE phenomenology. NDE memories scored higher than both real and imagined event memories (N=39, H(3)=20.57, p<0.001), suggesting they cannot be dismissed as confabulations. Read after Greyson's consistency data to see converging evidence from a different methodological tradition (memory science vs. longitudinal NDE scales).

"Reality" of near-death-experience memories: evidence from a psychodynamic and electrophysiological integrated study

Palmieri, Calvo, Kleinbub, Meconi, Marangoni, Barilaro, Broggio, Sambin & Sessa (2014)

Extends Thonnard et al. (2013) by adding EEG evidence: NDE memories (N=10 NDErs) were phenomenologically indistinguishable from real memories (p=0.185) but neurally distinct, with unique correlations to delta (r=0.778) and theta bands during hypnotic recall. First study integrating hypnosis protocol with EEG in NDE research. Read after Thonnard to see how electrophysiology strengthens the "realer than real" claim with objective neural markers.

Intensity and Memory Characteristics of Near-Death Experiences

Martial, Charland-Verville, Cassol, Didone, Van Der Linden & Laureys (2017)

Survey of 152 NDErs shows Greyson NDE scale total score positively correlated with MCQ total score (r=0.29, p<0.0005); intensity specifically associated with sensory details, personal importance, and reactivation frequency. No association with time since NDE (mean 23 years), supporting memory stability. Largest NDE memory study between Thonnard (2013) and Moore & Greyson (2017); establishes dose-response relationship between NDE depth and memory richness. Read after Palmieri to see converging evidence from a different angle (intensity gradient rather than memory type comparison).

Seeing Dead People Not Known to Have Died: Peak in Darien Experiences

Greyson (2010)

Documents cases where NDE experiencers report seeing deceased persons whose deaths the experiencer could not have known about. A strong evidential category.

Cosmological Implications of Near-Death Experiences

Greyson (2011)

Integrates three NDE evidence lines (enhanced mentation during arrest, veridical OBE, Peak in Darien cases) into an argument that consciousness survives brain death, requiring a post-materialist cosmology.

Epistemological Implications of Near-Death Experiences and Other Non-Ordinary Mental Expressions: Moving Beyond the Concept of Altered State of Consciousness

Facco, Agrillo & Greyson (2015)

Systematic epistemological critique of neurobiological NDE explanations. Traces the mechanist-reductionist paradigm to Galileo/Descartes and proposes 'Non-Ordinary Mental Expressions' as a replacement for the 'altered states' framework.

Neuro-Functional Modeling of Near-Death Experiences in Contexts of Altered States of Consciousness

Romand & Ehret (2023)

Reviews five neuro-functional approaches to NDE generation (drugs, epilepsy, brain stimulation, anesthesia, ischemic stress) including ~1,000 fighter pilot G-LOC episodes; localizes OBEs to the temporo-parietal junction; concludes NDEs are hallucination-like phenomena from brains in altered states of consciousness. Represents the contemporary neuroscientific/skeptical perspective — read immediately after Facco et al. (2015) to see the competing interpretations of similar evidence.

DMT Models the Near-Death Experience

Timmermann et al. (2018)

First controlled study to show that IV DMT (N=13, placebo-controlled) reproduces the full NDE phenomenological profile as measured by the Greyson NDE scale (d = 3.09 vs. placebo). DMT-induced NDE scores were comparable to matched actual NDE experiencers (d = 0.49). Personality traits (absorption, delusional ideation) predicted NDE intensity. If a serotonergic drug can generate indistinguishable NDE phenomenology, this is the strongest pharmacological evidence for neurobiological rather than transcendent explanations. Read after entries 12-13 to see the full range of neuroscientific challenges before the AWARE study.

AWARE -- AWAreness during REsuscitation

Parnia et al. (2014)

The largest prospective hospital study of consciousness during cardiac arrest. Uses hidden visual targets to test whether out-of-body perception is veridical.

Anomalous Information Reception by Research Mediums Under Blinded Conditions II

Beischel et al. (2015)

Replication and extension of the 2007 triple-blind mediumship study. Confirms that some mediums produce statistically significant hits under strict blinding.

Temporality of Features in Near-Death Experience Narratives

Martial et al. (2017)

Tests whether NDEs follow a fixed universal sequence (as claimed by Ring 1980 and popularized by Moody). Analysis of 154 French NDE narratives (Greyson Scale ≥7) finds no invariant sequence: 27 different four-feature orderings occur, and even the most common appears in only 22% of applicable narratives. OBE is the most frequent first feature (35%). IRR kappa = 0.95. Read before Kondziella to see what rigorous phenomenological analysis of NDE structure actually reveals — the variability challenges both naive stage-sequence accounts and simple neurological models.

Explanation of Near-Death Experiences: A Systematic Analysis of Case Reports and Qualitative Research

Hashemi et al. (2023)

Systematic qualitative synthesis of 54 studies (465 NDErs) across multiple cultures; identifies 4 main NDE categories with 19 subcategories and establishes that the phenomenological core (OBEs, tunnel, heightened senses) is universal across cultures, with variation confined to interpretation. Concludes NDEs are "medically inexplicable." NOTE: Catalog ID misattributes authorship to Kondziella; actual first author is Hashemi. ## How to Use These Paths - Read actively: for each paper, note the year, the journal, and the sample size or scope. These contextual details matter as much as the conclusions. - Cross-reference paths: many papers appear in more than one path. Each time you encounter a paper in a different context, you will understand it differently. - Follow the debate pairs: several paths deliberately place a pro-psi paper next to its skeptical response (e.g., Bem & Honorton 1994 / Hyman 1994, Bosch et al. 2006 / Radin 2006). Reading both back-to-back is where the real learning happens. - Use the catalog: every entry includes a catalog ID (e.g., `cardena_2018_experimental`) that maps directly to `_CATALOG.json` for metadata, DOIs, and file locations. --- ## How to use this path - If you are an AI agent: Each paper is cited with its catalog ID in backticks. Cross-reference with `_CATALOG.json` for full bibliographic information and methodology data. - If you are a human reader: Follow the papers in order for a deep dive into NDEs and consciousness survival. - To update: When new papers are added to the library that advance this path's purpose, add them in order and renumber all subsequent entries. Back to [Reading Paths Index](_INDEX.md)