Chapter 3

How NDE Research Works — Methodology, Standards, and the Difference Between Good and Bad Evidence

Imagine you are sitting in a hospital waiting room while a loved one undergoes open-heart surgery. A friend leans over and whispers, "I heard people see things when they die — lights, tunnels, dead relatives. Is any of that real?" How would you answer? How should you answer? Most people rely on gut instinct, personal stories they have heard, or whatever book happens to be on their nightstand. But there is a much better way. There is an entire field of rigorous, peer-reviewed research on near-death experiences — research conducted by medical doctors, psychiatrists, cardiologists, and neuroscientists, published in some of the most respected journals in the world. The question is not whether NDE research exists. It does. The question is whether you know how to read it, evaluate it, and tell the difference between the gold standard and fool's gold.

That is what this chapter is about. I want to give you a toolkit — a set of practical skills you can use to evaluate any NDE claim you encounter, whether it comes from a peer-reviewed medical journal or a bestselling paperback at the airport. Not all NDE evidence is created equal. Some of it is rock-solid. Some of it is interesting but limited. And some of it, frankly, is unreliable or even fraudulent. If we are going to take NDEs seriously — and I believe we should — then we need to know how to separate the wheat from the chaff. We need intellectual honesty, not gullibility. And we need genuine openness, not knee-jerk dismissal.

So let us roll up our sleeves and learn how the science actually works.

Why does methodology matter so much? Because the stakes are enormous. If NDEs are genuine glimpses of an afterlife — if the soul truly separates from the body and perceives real events during clinical death — then we are looking at evidence with profound implications for how we understand human nature, death, and God. But if NDEs are just hallucinations produced by a dying brain, then we are dealing with fascinating neuroscience but nothing more. The methodology determines which conclusion is warranted. Get the methodology wrong, and you will reach the wrong conclusion — either accepting bogus evidence or dismissing legitimate evidence. Neither error is acceptable.

As Christians, we have a special responsibility to handle evidence honestly. The ninth commandment — "You shall not bear false witness" (Exodus 20:16, ESV) — applies to intellectual inquiry just as much as to courtroom testimony. We must not exaggerate the evidence to make NDEs seem more conclusive than they are. And we must not dismiss the evidence to protect a theological system that feels threatened by it. We must simply tell the truth about what the evidence shows. That is what this chapter aims to help you do.

The "Unscientific" Objection — And Why It Fails

One of the most common criticisms lobbed at NDE research is that it is "unscientific." People who have never read a single NDE study will sometimes wave their hand and say, "That's not real science." This criticism sounds confident, but it is uninformed. The truth is that NDE research has been conducted by credentialed medical professionals and academic researchers using rigorous methodologies for over fifty years. It has been published in peer-reviewed journals that include The Lancet (one of the world's most prestigious medical journals), Resuscitation (the leading journal for cardiac arrest research), Critical Care, the Journal of Near-Death Studies, and the Annals of the New York Academy of Sciences.¹

The researchers themselves are not fringe characters. They include cardiologists like Michael Sabom and Pim van Lommel, critical care physicians like Sam Parnia, radiation oncologists like Jeffrey Long, and psychiatrists like Bruce Greyson, who holds an endowed chair at the University of Virginia and has published over one hundred peer-reviewed articles on NDEs across a career spanning more than four decades.² These are not tabloid writers. They are serious scientists working within the standard frameworks of medical and psychological research.

The methodologies they use are the same ones employed throughout medical science: prospective study designs, control groups, standardized measurement instruments (such as the Greyson NDE Scale, discussed in Chapter 2), statistical analysis, and peer review. As J. Steve Miller points out in his doctoral dissertation on deathbed experiences, those who dismiss NDE research as "unscientific" often rely on an unrealistically narrow definition of science — one that would also disqualify forensic science, historical geology, cosmology, and most social science research.³ Science does not require that every phenomenon be reproducible in a laboratory. It requires careful observation, hypothesis testing, and openness to where the evidence leads. NDE research meets this standard.

Miller also helpfully addresses several popular methodological objections. Some critics claim that NDE evidence is merely "testimonial" and therefore unscientific. But scientists use testimonial evidence constantly — in surveys, patient interviews, forensic investigations, and clinical trials. The question is not whether testimony counts as evidence, but whether we have good tools to assess its reliability. We do.⁴ Others claim that "real science" deals only with things that can be reproduced in a laboratory. But the Big Bang cannot be reproduced in a lab. Neither can a shooting star, a geological formation, or a murder. Forensic scientists, cosmologists, and geologists all study unrepeatable events using careful scientific methods — and NDE researchers do the same.⁵

Still others insist that science can only deal with physical, material phenomena. But much of modern science deals with entities that cannot be directly observed — dark matter, subatomic particles, gravity itself. We know these things exist because of their effects. Similarly, we may not be able to directly observe the soul leaving the body — but when a patient who was clinically dead with eyes taped shut accurately describes the surgical instruments used during her operation, something is happening that demands explanation. The effects are observable even if the mechanism is not yet fully understood.⁶

The bottom line is this: NDE research is not perfect. No area of scientific research is. But it is genuine, rigorous, and improving all the time. The right response is to engage with the evidence carefully, not to dismiss it without reading it.

The Scientific Method Applied to NDEs

If we are going to claim that NDE research is genuinely scientific, we need to show how it actually applies the scientific method. Miller, in his doctoral dissertation, walks through this in a helpful way. He sets up two competing hypotheses — the approach recommended by NDE skeptic Susan Blackmore herself:⁴⁹

The Dying Brain Hypothesis: There is no afterlife and no spiritual world outside the natural world. When our brains die, we die — our minds, thoughts, memories, and personalities. The data concerning NDEs and deathbed experiences can be best explained as purely natural phenomena.

The Afterlife Hypothesis: There is an afterlife. Physical death does not annihilate our conscious selves. The data concerning NDEs and deathbed experiences is best explained as pointing to a spiritual world in which our conscious selves continue to exist.

This is how science is supposed to work. You set up competing hypotheses and then test them against the data. For each piece of evidence — veridical perception during cardiac arrest, the cross-cultural consistency of NDE reports, the fact that NDE content often contradicts the experiencer's prior beliefs, the remarkable stability of NDE memories over time, the profound life transformation that follows — we ask: "Which hypothesis makes better sense of this datum?" Or, as scientists put it: "Which hypothesis has more explanatory power?"⁵⁰

Miller also provides practical guidance for evaluating evidence as you go. He recommends that readers assess each line of evidence on an 11-point scale, ranging from "this strongly supports the dying brain hypothesis" at one end to "this strongly supports the afterlife hypothesis" at the other. This prevents the reader from finishing a long study in a mental fog, unable to remember what they concluded about each piece of evidence. It forces active evaluation rather than passive reading — and active evaluation is exactly what honest inquiry requires.⁵¹

Additionally, Miller draws on principles from forensic science and historical investigation. When evaluating individual NDE cases, he asks the same questions that a historian or a detective would ask: Is the source reliable? Is this a firsthand or secondhand account? Is there independent corroboration? Does the witness have a motive to lie or exaggerate? Is the testimony internally consistent? Is it consistent with what other witnesses report? These are not exotic techniques. They are the standard tools of evidence evaluation, applied carefully to the NDE data.⁵²

I find this approach deeply helpful. It removes the discussion from the realm of vague intuitions and emotional reactions and places it squarely in the realm of evidence and argument. It also removes the excuse of ignorance. Once you know how to evaluate NDE evidence — once you know the tiers, the red flags, the competing hypotheses, and the standards of verification — you can no longer honestly say, "I just don't know what to make of all this." You have the tools. Now it is a matter of using them honestly.

The Hierarchy of NDE Evidence: Five Tiers

Not all NDE evidence carries the same weight. Just as a doctor would not give equal weight to a randomized controlled trial and a friend's anecdote about a miracle cure, we should not give equal weight to every type of NDE evidence. I find it helpful to think of NDE evidence in five tiers, arranged from strongest to weakest. Understanding these tiers will protect you from two errors: being too gullible (accepting every NDE claim at face value) and being too dismissive (rejecting the entire field because of a few unreliable cases).

Tier One: Prospective Hospital Studies (The Gold Standard)

The strongest type of NDE evidence comes from what researchers call "prospective" studies. That word simply means "planned in advance." In a prospective NDE study, researchers set up the study before any data is collected. They go to a hospital, get permission to work there, and then wait. When a patient has a cardiac arrest and is resuscitated, the researchers interview that patient as soon as possible using standardized questionnaires. They also interview control patients — people who had cardiac arrests but did not report NDEs — and compare the two groups. Everything is done systematically, with the same questions asked of every patient, the same scoring methods, and the same statistical analysis applied to all the data.⁷

Why is this the gold standard? Because it eliminates many of the problems that plague less rigorous methods. The patients are interviewed soon after the event, which minimizes memory distortion. The researchers did not select these patients because they had interesting stories — the patients were identified simply because they had cardiac arrests, whether or not they had NDEs. This eliminates selection bias. And the use of control groups allows researchers to compare NDErs with similar patients who did not have NDEs, ruling out explanations based on the general stress of nearly dying.

Let me walk you through the four most important prospective studies in NDE research.

The Van Lommel Study (2001). Dutch cardiologist Pim van Lommel led a team that studied 344 consecutive cardiac arrest patients across ten Dutch hospitals over a period of several years. Of those 344 patients, 62 (18%) reported near-death experiences. The study was published in The Lancet — not a fringe journal, but one of the two or three most prestigious medical journals on earth.⁸

Why does this study matter so much? First, it was prospective: patients were identified and interviewed as part of a pre-planned protocol, not because they came forward with an interesting story. Second, it was controlled: the NDErs were compared with the 282 cardiac arrest survivors who did not report NDEs, allowing researchers to ask what made the NDErs different. Third, it included follow-up interviews at two years and eight years after the event, showing that NDE memories remained remarkably stable over time — unlike dreams or hallucinations, which fade quickly. And fourth, it was published in a peer-reviewed journal with rigorous editorial standards, meaning it had to pass the scrutiny of independent expert reviewers before it could appear in print.

Van Lommel's findings challenged the dying-brain hypothesis. He found that neither the duration of cardiac arrest, nor the medications administered, nor the patient's prior knowledge of NDEs predicted whether someone would have an NDE. If NDEs were simply the product of a dying brain, we would expect them to correlate with the severity of the medical crisis — but they did not. Van Lommel also noted that the 18% incidence rate is itself significant: if NDEs were caused by oxygen deprivation or another universal physiological process that occurs during cardiac arrest, we would expect a much higher percentage of cardiac arrest survivors to report them — closer to 100%. The fact that only a minority experiences NDEs, despite all patients undergoing the same physiological crisis, suggests that something other than brain physiology is selecting who has the experience.⁹

Van Lommel followed up with his patients at two years and again at eight years after their cardiac arrests. What he found was striking: the NDErs' memories of their experiences had remained remarkably stable and detailed over the entire period. This is not what we would expect if the NDEs were confabulated memories or hallucinations. Fabricated memories and hallucinations tend to fade, shift, and change with retelling. But NDE memories behave more like memories of real events — they remain vivid, consistent, and emotionally powerful for decades. This stability is itself a data point in favor of the reality of the experience.

The Parnia AWARE Studies (2014, 2022). Sam Parnia, a critical care physician and researcher, launched the most ambitious NDE study ever attempted. The AWARE (AWAreness during REsuscitation) project spanned 15 hospitals in three countries — the United States, the United Kingdom, and Austria. AWARE I studied 2,060 cardiac arrest patients, of whom 330 survived. Of those survivors who could be interviewed, 39% reported some form of awareness during the time they were clinically dead, even though most did not have full NDEs meeting the Greyson Scale threshold.¹⁰

AWARE introduced a creative methodology: hidden visual targets were placed on shelves in cardiac arrest rooms, visible only from above. The idea was simple but brilliant: if a patient has a genuine out-of-body experience during cardiac arrest and floats above the room, they should be able to see the hidden target and describe it afterward. If they are merely hallucinating, they would have no way of knowing what is on the shelf. Unfortunately, the vast majority of cardiac arrests occurred in rooms without targets, or the patients were too sick to be interviewed. The visual target methodology has not yet produced a definitive positive result — but neither has it been refuted. AWARE II continued this research, and Parnia has published guidelines for studying recalled experiences of death that have helped standardize the field.¹¹

One of the most striking cases from the AWARE project involved a man who had a cardiac arrest and was deeply unconscious. A nurse removed his dentures during resuscitation and placed them in a specific drawer. The patient later accurately identified the nurse and described exactly which drawer contained his dentures — information he had no normal means of knowing while he was clinically dead.¹²

The Sabom Atlanta Study (1994–1998). Cardiologist Michael Sabom, a committed Christian and elder in the Presbyterian Church in America (PCA), conducted what he called "The Atlanta Study." Sabom interviewed 160 patients, most from his own clinical practice. Forty-seven of them had experienced NDEs; the rest served as a comparison group. Sabom was meticulous in his methodology. He used Bruce Greyson's NDE Scale to ensure that every experience he classified as an NDE met the standardized research threshold (a score of 7 or higher out of 32). He required that every subject had survived a clearly defined near-fatal physical crisis with loss of consciousness. And he insisted on what he called "virgin cases" — people who had never told their NDE story to a mass audience, to avoid the contamination that can come from repeated public retelling.¹³

Sabom also made an important methodological decision that other researchers had overlooked. He carefully differentiated between types of religious believers. Rather than lumping all Christians together, he divided his subjects into conservative Christians, liberal Christians, God-believers who were not Christian, and atheists. He then used carefully constructed questionnaires to measure changes in religious belief, practice, and life orientation before and after the NDE. This allowed him to ask a question that is crucial for Christians: does having an NDE lead people away from conservative Christian faith, or toward it?¹⁴

The results were striking. Sabom's NDErs did not abandon traditional Christianity after their experiences. Conservative Christians remained conservative — and in many cases became more devout, with increased prayer, Bible reading, and church attendance. This finding is directly relevant to the concerns raised by some Christian critics, who worry that NDEs lead people astray theologically. As we will explore in detail in Chapter 31, Sabom's data suggests the opposite: NDEs tend to deepen Christian faith, not undermine it.¹⁵

The Sartori Welsh Study (2008). Penny Sartori, a nurse in a Welsh hospital, conducted a five-year prospective study of NDEs in her intensive care unit. Her study is valuable for several reasons. First, as an ICU nurse, Sartori had direct, ongoing contact with her patients — she was not a visiting researcher who parachuted in for an interview and left. She was there at the bedside when patients were resuscitated, and she could interview them promptly. Second, Sartori compared NDErs' descriptions of their own resuscitations with descriptions offered by control patients (who had also been resuscitated but did not report NDEs). The result was telling: the NDE patients were significantly more accurate in their descriptions of what happened during their resuscitations than the control patients, who tended to make errors based on what they had seen on television medical dramas. The NDE patients described specific details — equipment, procedures, positions of staff — that they could not have known while they were unconscious with their eyes closed.¹⁶

Sartori also found that her NDE patients, after their experiences, showed increased engagement with traditional religious practices including prayer, church attendance, and Bible reading — a finding consistent with Sabom's Atlanta Study.¹⁷

Tier Two: Retrospective Research Studies

The next tier of evidence comes from retrospective studies — research in which scientists interview or survey people who report having had an NDE at some earlier point in their lives. These studies are not set up in advance. Instead, researchers recruit participants who have already had NDEs and interview them in depth, often years after the experience.

This is the category that includes some of the most important and influential NDE research ever conducted. Raymond Moody's pioneering work Life After Life (1975), which first brought NDEs to public attention and coined the very term "near-death experience," was based on retrospective interviews.¹⁸ Kenneth Ring's landmark studies Life at Death (1980) and Heading Toward Omega (1984) used standardized interview protocols and statistical analysis applied to retrospective samples, bringing scientific rigor to what Moody had described more informally.¹⁹ Bruce Greyson's decades of data collection at the University of Virginia — the largest academic archive of NDE cases in the world — is largely retrospective.²⁰

Retrospective studies have real strengths. They often yield rich, detailed qualitative data because the researcher can spend extended time with each participant. They allow for the study of long-term aftereffects — how an NDE changed someone's life over years or decades. And they have produced some of the field's most important theoretical insights, including Ring's identification of the "core NDE" that transcends cultural variation.

But retrospective studies also have genuine weaknesses that an honest reader should be aware of. Memory can shift over time. Details can be embellished, sharpened, or forgotten — often unconsciously. People who had particularly vivid or dramatic NDEs are more likely to volunteer for studies, creating what researchers call "self-selection bias." This means the sample may not represent the full range of NDE experiences. And because the interviews occur long after the event, there is no medical chart from the time of the NDE to verify the clinical details.

These weaknesses do not make retrospective studies useless. Far from it. But they do mean we should weight them somewhat less heavily than prospective studies. When a prospective study and a retrospective study reach the same conclusion — as they often do — our confidence in that conclusion is strengthened considerably.

It is also worth noting that Greyson's data collection at the University of Virginia, while largely retrospective in its initial interviews, has produced some of the most careful and detailed analyses in the field. Greyson developed the NDE Scale precisely to bring standardized measurement to what had previously been impressionistic and anecdotal. His scale allows researchers to assign a numerical score to each NDE, making it possible to compare experiences across studies, cultures, and time periods. This kind of standardization is essential for any field that aspires to scientific rigor — and Greyson's work has provided the foundation that virtually every subsequent NDE study has built upon.²⁰

I should also mention the important work done at the Division of Perceptual Studies (DOPS) at the University of Virginia, where Greyson worked alongside researchers like Ian Stevenson and, more recently, Jim Tucker. DOPS has amassed one of the largest academic archives of anomalous experiences — including NDEs, deathbed visions, and past-life memory cases — in the world. The academic rigor of this department, housed within a major research university, is significant. It demonstrates that NDE research can be, and is being, conducted within mainstream academic institutions using standard scholarly methods.

Tier Three: Self-Reported Online Databases (NDERF)

The third tier of evidence comes from large-scale, self-reported databases — the most important of which is the Near Death Experience Research Foundation (NDERF) database, created and maintained by radiation oncologist Jeffrey Long. As of this writing, NDERF contains over 5,000 NDE accounts, making it the largest collection of near-death experiences in the world.²¹

NDERF works like this: people who believe they have had an NDE visit the NDERF website and fill out a detailed questionnaire about their experience. Their responses are submitted electronically and stored in the database. Long and his team then analyze these responses, looking for patterns, trends, and statistically significant findings. Long has published two major books drawing on this data: Evidence of the Afterlife (2010), in which he presents nine lines of evidence for the reality of NDEs, and God and the Afterlife (2016), in which he analyzes 420 NDEs that involved encounters with God or a divine being.²²

Miller, who made extensive use of NDERF data in his own research, offers a careful and balanced assessment of the database's strengths and weaknesses. On the strength side, NDERF provides something that no other source does: full, unedited accounts of NDEs from a vast range of conditions. Unlike hospital-based studies that focus almost entirely on cardiac arrest, NDERF includes NDEs from drowning, car accidents, combat injuries, suicide attempts, surgical complications, allergic reactions, and many other situations. This gives researchers access to the full spectrum of NDE triggers, not just the cardiac arrest subset.²³

Another strength is that NDERF accounts are complete and unedited. When you read an NDE in a research paper or a book, you are usually reading excerpts that the researcher selected to illustrate a point. At NDERF, you get the whole story — including parts that might not fit neatly into any researcher's theory. This is invaluable for anyone who wants to see the raw data rather than a pre-filtered summary.

Miller also developed an innovative methodology for using NDERF data. Rather than cherry-picking interesting cases, he studied 100 consecutively uploaded NDEs — that is, the next 100 accounts submitted to the site, in the order they arrived, regardless of content. This eliminated the selection bias that can occur when a researcher picks the most dramatic or theologically interesting stories. By analyzing consecutive uploads, Miller ensured that his sample reflected the full range of what people actually report — the mundane along with the spectacular, the confusing along with the clear.²⁴

But NDERF also has genuine weaknesses that must be acknowledged. There is no direct medical verification that the person submitting the account was actually near death. Someone could fabricate an account (though Long has mechanisms to screen for this). There is no control group. And the accounts are submitted by the experiencer, not collected by a trained researcher who can ask follow-up questions in real time.

The takeaway: NDERF data is valuable. It reveals patterns and trends that hospital studies, with their smaller sample sizes, might miss. But it should supplement, not replace, the more rigorous evidence from prospective and retrospective research. When NDERF data confirms findings from prospective hospital studies — and it often does — our confidence in those findings increases.

Tier Four: Popular Testimonial Books (The Most Unreliable Tier)

The weakest category of NDE evidence — at least for research purposes — consists of popular testimonial books. These are the NDE accounts that most people encounter first, because they are the ones that get published by mainstream publishers, promoted on talk shows, and displayed in bookstore windows. Titles like Heaven Is for Real, Proof of Heaven, 90 Minutes in Heaven, and To Heaven and Back have sold millions of copies and shaped public perception of NDEs far more than any peer-reviewed journal article ever has.

Let me be clear: some popular NDE books are credible and valuable. Michael Sabom's Light and Death is a popular-level book, but it is written by a cardiologist with rigorous research methodology, detailed medical documentation, and careful theological reflection. John Burke's Imagine Heaven is a pastoral book, but Burke systematically compares NDE accounts with biblical teaching and draws responsibly from the professional research literature.²⁵ These books are trustworthy precisely because their authors care about evidence, methodology, and accuracy.

But other popular NDE books are unreliable — and some have been exposed as outright fraudulent. The most infamous case is The Boy Who Came Back from Heaven, published in 2010 by Kevin Malarkey about his son Alex, who was severely injured in a car accident. The book claimed that Alex visited heaven and returned with a vivid account of what he saw. It became a bestseller, selling over a million copies. There was just one problem: Alex Malarkey later publicly recanted the entire story. In a letter posted online in 2015, Alex wrote that he had made it all up. He had not visited heaven. He had not seen angels. The whole thing was fabricated. The publisher pulled the book from shelves.²⁶

The Malarkey case is a cautionary tale that should make every reader more careful. When a book sits on the "Christian inspiration" shelf at a bookstore, that does not mean its contents have been verified by anyone. Publishers are in the business of selling books, not verifying supernatural claims. The fact that a story is compelling and emotionally satisfying does not make it true.

Another instructive case is Eben Alexander's Proof of Heaven (2012). Alexander, a neurosurgeon, described a vivid NDE he experienced while in a coma from bacterial meningitis. The book became a massive bestseller. But the theological content of Alexander's NDE is deeply problematic from a biblical perspective. Alexander claims to have been told that reincarnation is real, that all religions lead to the same God, and that Jesus is not uniquely important. Shaun Tabatt, in The NDE Conspiracy, rightly flags these claims as incompatible with biblical Christianity.²⁷ Alexander may have had a genuine spiritual experience — I am not in a position to say. But his interpretation of that experience contradicts the clear teaching of Scripture. This is a perfect illustration of a principle we will explore in depth in Chapter 26: the experience may be real, but the interpretation can still be wrong.

The lesson here is not that all popular NDE books are garbage. The lesson is that popular books should never be the primary basis for evaluating NDEs. The professional research literature — the prospective studies, the retrospective research, the peer-reviewed analyses — is far more reliable. Read the popular books for inspiration if you wish, but ground your convictions in the evidence that has been tested, scrutinized, and held up to rigorous peer review.

One more observation about popular NDE books deserves mention. Even among credible popular books, there is an inherent tension between what sells and what is scientifically careful. A book titled I Saw Heaven and Here Is Exactly What It Looks Like will sell far more copies than a book titled A Prospective Analysis of Reported Anomalous Perceptual Experiences During Cardiac Arrest. Publishers know this. The market incentivizes certainty, drama, and vivid detail — all of which can work against the careful hedging and methodological honesty that good science requires. This does not mean popular books are all dishonest. It means the reader must be aware of the pressures that shape them and read accordingly.

Miller makes an important point in this regard: when someone is reading NDE cases submitted anonymously to a website, or reading personal testimonies published outside of professional research contexts, they have entered what he colorfully calls "the Wild, Wild West of NDEs." In hospital settings, people have little reason to lie or exaggerate about their NDEs. Hospital records can be examined. Medications can be verified. Mental illness can be screened for. But outside those controlled environments, the reader must be much more discerning — which is why the red flags we will discuss shortly are so important.²⁶

Tier Five: Veridical Evidence (The Category That Changes Everything)

Now we come to a category that cuts across all the others — and that, in my view, changes the entire NDE debate. This is the category of veridical near-death experiences.

The word "veridical" comes from the Latin word veridicus, meaning "truth-telling." A veridical NDE is one in which the person who had the experience reports specific, verifiable information about events that occurred during their clinical death — information they could not have obtained through any normal sensory channel. Their eyes were taped shut. Their brain showed no electrical activity. Their heart had stopped. And yet, when they were revived, they accurately described what was happening in the operating room — or even in other rooms of the hospital — while they were "dead."²⁸

This is the evidence that skeptics cannot explain away. If a dying person has a subjective experience of peace, light, and love, a skeptic can say, "That's just a hallucination — the dying brain producing pleasant imagery." And while I think that explanation has serious problems (as we will discuss in Appendix B), it is at least logically possible. But when a patient who was clinically dead, with eyes shut and brain flatlined, accurately describes the specific surgical instruments used during her operation, the specific things the surgeon said, the specific color of the shoe sitting on a third-floor window ledge on the other side of the building — a hallucination explanation is no longer credible. A hallucination cannot give you accurate information about objects you have never seen in locations you have never visited.

We will explore veridical NDE evidence in depth in Chapters 6 through 8. Chapter 6 presents the full range of veridical evidence, including Sabom's pioneering comparison of NDE patients' descriptions with their actual medical records. Chapter 7 is devoted entirely to the Pam Reynolds case — perhaps the single most evidentially powerful NDE ever documented, in which a woman accurately described her brain surgery while her brain was completely drained of blood, her body temperature was lowered to 60 degrees Fahrenheit, and her EEG showed a flat line. Chapter 8 examines what may be the most astonishing category of all: blind people — including people who have been blind from birth and have never had a visual experience in their entire lives — who report seeing during their NDEs, and whose visual reports are verified by sighted witnesses.

For now, I simply want to plant this idea in your mind: the existence of veridical NDEs means that the NDE debate is no longer about subjective feelings. It is about verifiable facts. And facts change the rules of the game.

Who Are the Researchers? — Why Credentials Matter

In any field of research, the qualifications and track record of the researchers matter. This does not mean we blindly trust anyone with impressive credentials. Smart people can be wrong. But knowing who is behind the research helps us evaluate its reliability. Let me briefly introduce the major researchers whose work forms the backbone of NDE science, so you can see the caliber of scholarship involved.

Michael Sabom, M.D. — A board-certified cardiologist in Atlanta, Georgia, Sabom has spent decades treating patients with life-threatening heart conditions. He entered NDE research as a skeptic — he initially thought the whole thing was "hogwash," as he put it.²⁹ But after interviewing patients who accurately described their own cardiac resuscitations in astonishing detail, he changed his mind. His two books — Recollections of Death (1982) and Light and Death (1998) — are models of careful medical research combined with thoughtful Christian theological reflection. Bill Bright, the founder of Campus Crusade for Christ (now Cru), endorsed Sabom's work, calling it "a needed scientific look at near-death experiences under the scrutiny of God's holy Word."³⁰

Pim van Lommel, M.D. — A Dutch cardiologist who led the landmark 2001 Lancet study of 344 cardiac arrest patients. Van Lommel's study is widely regarded as the most methodologically rigorous prospective NDE study ever published. His book Consciousness Beyond Life (2010) presents his findings in accessible language.

Sam Parnia, M.D., Ph.D. — A critical care physician and researcher affiliated with NYU Langone Medical Center (and previously at the University of Southampton). Parnia has led the AWARE studies — the largest prospective investigation of consciousness during cardiac arrest ever undertaken. He is also the author of Erasing Death (2013) and has published pioneering guidelines for the study of recalled experiences of death.³¹

Bruce Greyson, M.D. — The Chester F. Carlson Professor Emeritus of Psychiatry and Neurobehavioral Sciences at the University of Virginia. Greyson is the architect of the Greyson NDE Scale — the standardized measurement tool that allows researchers to quantify and compare NDE experiences. With over 100 peer-reviewed publications and more than 40 years of research, Greyson is widely considered the dean of academic NDE research. His comprehensive overview After (2021) summarizes his career's work.³²

Jeffrey Long, M.D. — A radiation oncologist who created the NDERF database and has published two major books analyzing its data. Long's nine lines of evidence for the afterlife (presented in Evidence of the Afterlife) and his God Study (presented in God and the Afterlife) are important reference points for any serious student of NDEs.³³

Penny Sartori, Ph.D. — A UK intensive care nurse who conducted a five-year prospective study of NDEs in her hospital. Sartori brings a unique perspective as someone who was present at the bedside during the events she studied. Her book The Wisdom of Near-Death Experiences (2014) is based on her doctoral research.³⁴

Kenneth Ring, Ph.D. — A psychologist and professor emeritus at the University of Connecticut who brought systematic methodology to NDE research in the early 1980s. Ring's studies of blind NDErs (published as Mindsight, co-authored with Sharon Cooper) represent one of the most evidentially powerful lines of NDE research ever conducted.³⁵

This is not a field populated by amateurs and wishful thinkers. These are trained medical professionals and academics, many of whom entered the field as skeptics. Their collective body of work represents a serious, sustained, and methodologically sophisticated investigation of a phenomenon that demands explanation.

How to Read an NDE Study: A Practical Checklist

I want to give you something practical — a checklist you can use anytime you encounter an NDE claim, whether in a peer-reviewed journal or on someone's blog. Ask these questions, and you will quickly be able to separate strong evidence from weak evidence.

1. Was the person actually near death? This sounds obvious, but it matters. NDEs are, by definition, "near-death" experiences. If someone had a vivid vision while meditating, during a drug trip, or while falling asleep, it may be a meaningful spiritual experience — but it is not an NDE in the technical sense. The Greyson NDE Scale helps here: does the experience meet the threshold score of 7 out of 32?³⁶

2. What type of study does this come from? Is it from a prospective hospital study, a retrospective research project, a self-reported database, or a popular book? The answer tells you how much weight to give it.

3. Who is the researcher? What are their credentials? Where do they work? Have they published in peer-reviewed journals? Do they have a track record of careful, honest work?

4. Are there control groups? Was the NDE group compared with a matched group of non-NDE patients? Without a control group, it is difficult to know whether the findings are specific to NDEs or common to anyone who nearly dies.

5. Is there veridical evidence? Did the person report specific, verifiable information that they could not have known through normal means? Veridical evidence is the strongest type of evidence and is extremely difficult to explain away.

6. Could the account have been influenced by prior knowledge? Had the person read NDE books, watched documentaries, or attended NDE conferences before reporting their experience? Sabom's insistence on "virgin cases" — people who had not been exposed to NDE literature — is a model of methodological care.³⁷

7. Is the person promoting something? Are they selling a book, building a brand, or promoting a ministry? This does not automatically disqualify their testimony — Sabom sold books too — but it does introduce a potential motive for exaggeration that should be acknowledged.

8. Does the account include specific, verifiable details? The more specific and checkable the claims, the more weight the account carries. An NDE that says "I felt peace and saw a light" is subjective and difficult to evaluate. An NDE that says "I saw Dr. Rodriguez pick up a blue-handled instrument from the third tray on the left" is specific and verifiable. The first type of account is common and may be genuine, but it does not carry much evidential weight. The second type — if verified — is extraordinarily powerful.

9. How soon after the event was the account recorded? An account recorded within hours or days of the event — ideally by a trained interviewer using standardized protocols — is far more reliable than one recalled years later. This is one reason why prospective studies are so valuable: the interview occurs as soon as the patient is medically stable, before memory has had time to shift.

10. Does the account fit the overall pattern of well-documented NDEs? While every NDE is unique in its details, the core features identified by Moody, Ring, Greyson, and Long are remarkably consistent. An account that includes many of these core features — out-of-body perception, heightened awareness, intense peace, encounter with light, encounter with deceased relatives, life review — is more likely to be a genuine NDE than an account that contains none of them or that describes features more typical of hallucinations or dreams.

These ten questions will not make you an expert overnight. But they will protect you from the two extremes that plague most discussions of NDEs: uncritical credulity on the one hand, and uninformed dismissal on the other. The goal is honest, careful evaluation — and that is within reach for anyone willing to think clearly.

Red Flags: How to Spot Unreliable NDE Claims

Miller, in collaboration with NDE researcher Stuart Gray, developed what he calls "The Gray Scale" — a list of red flags that should make you cautious about any given NDE account. I find this tool extremely useful, and I want to share it with you here. These are not reasons to automatically reject an NDE, but they are reasons to exercise extra caution.³⁸

Red Flag #1: The person was not close to death. If there was no genuine medical crisis — no cardiac arrest, no critical injury, no respiratory failure — then whatever the person experienced may have been real and meaningful, but it was not a near-death experience by the standard research definition.

Red Flag #2: There are indications of mental illness. Some NDE accounts are submitted by people who mention psychiatric diagnoses, hearing voices regularly, or other indicators that suggest the experience may be related to a mental health condition rather than an actual near-death event. This requires careful discernment — having a mental illness does not disqualify a person from having a genuine NDE, but it does warrant additional scrutiny.

Red Flag #3: The person admits taking a hallucinogenic drug. If the experience occurred during a DMT, LSD, or psilocybin trip, it is a drug-induced experience, not an NDE — even if it shares some features with NDEs. The two are distinct phenomena and must be kept separate.

Red Flag #4: The report is secondhand or thirdhand. A firsthand account is always more reliable than "my uncle told me about his friend who told him about someone who had an NDE." Direct testimony, ideally recorded soon after the event, is far more valuable than reports that have passed through multiple retellings.

Red Flag #5: The person is promoting books or services. When someone has a financial incentive to make their NDE story more dramatic, more detailed, or more theologically provocative, we should be appropriately cautious. The Malarkey case is the most glaring example: a fabricated NDE story that sold over a million copies before being exposed as a lie. Niche or anomalous NDEs may sell better than ordinary ones precisely because they claim to offer something new — so the profit motive can push people toward exaggeration or invention.³⁹

Red Flag #6: The experience was "remembered" years later. The overwhelming consensus of NDE research is that genuine NDEs are unforgettable. They are burned into the memory with a vividness that does not fade — Van Lommel's eight-year follow-up confirmed the remarkable stability of NDE memories over time. If someone suddenly "remembers" an NDE decades later, especially after exposure to NDE literature or hypnotherapy, the account may be a false memory rather than a genuine recall.

Red Flag #7: Parts of the experience were vague or dreamlike. Genuine NDEs are overwhelmingly described as vivid, clear, and "more real than real." If someone describes their NDE as foggy, confusing, or dreamlike, it may have been a dream or hallucination rather than an NDE. Long's NDERF data confirms this: the vast majority of NDErs report greater-than-normal clarity of thought during their experience.⁴⁰

Red Flag #8: The account mixes "what happened" with "what I learned." Sometimes NDE accounts blend the actual experience with the person's subsequent theological reflection or interpretation. If someone says, "I was told that all churches are merely human institutions," we should ask: was that a specific message they received during the NDE, or is that their personal opinion shaped by years of negative church experiences? As we will discuss in Chapter 26, the experience itself and the interpretation of the experience are two very different things — and they need to be carefully distinguished.

Red Flag #9: The experience includes common features of hallucinations. If the account includes elements typically associated with hallucinations — such as disjointed, random imagery, paranoid delusions, or obvious misperceptions (seeing the doctor as a monster, for instance) — it may be that portions of the experience were hallucinatory rather than part of a genuine NDE. Even within a genuine NDE, some hallucinatory elements may intrude.

Red Flag #10: The experience does not score high enough on the Greyson Scale. If someone simply passed out and felt peaceful, that is not necessarily an NDE. The Greyson Scale provides an objective threshold. If an experience does not score at least 7 out of 32, it does not qualify as an NDE by research standards.⁴¹

A Brief Preview: What About Naturalistic Explanations?

Any intellectually honest treatment of NDEs must address the naturalistic explanations that skeptics have proposed. If NDEs can be fully explained by brain chemistry, oxygen deprivation, or psychological factors, then there is no need to invoke the soul, the afterlife, or God to account for them. We owe it to ourselves — and to the skeptics, who deserve a fair hearing — to take these explanations seriously.

I will address the major naturalistic explanations comprehensively in Appendix B, where each one receives detailed analysis and response. But let me briefly preview them here, because understanding what the skeptics claim — and where their claims fall short — is an important part of the methodological toolkit this chapter is trying to give you.

The major naturalistic explanations include:

Oxygen deprivation (anoxia/hypoxia): The brain is starved of oxygen during cardiac arrest, and the resulting dysfunction produces hallucinations that the patient interprets as an NDE. Problem: oxygen deprivation typically produces confused, disoriented, and fragmentary experiences — the opposite of the vivid, coherent, "more real than real" experiences reported by NDErs. Moreover, all cardiac arrest patients experience oxygen deprivation, but only a minority report NDEs.⁴²

DMT (dimethyltryptamine) release: The brain releases DMT, a naturally occurring psychedelic compound, at the moment of death, producing the NDE. Problem: there is no empirical evidence that the human brain releases DMT in quantities sufficient to produce the experiences described by NDErs. This is a hypothesis, not a finding — and it has not been confirmed.

Temporal lobe stimulation: Electrical stimulation of the temporal lobe can produce fragmentary experiences that resemble some NDE features (a sense of presence, vivid memories, feelings of peace). Problem: the experiences produced by temporal lobe stimulation are fragmentary and disjointed, not the coherent, narrative, life-transforming experiences described by NDErs. And they do not include veridical perception of events in other rooms.

REM intrusion: Some researchers suggest that NDEs are a form of dreaming that intrudes into waking consciousness during the dying process. Problem: NDErs overwhelmingly describe their experiences as distinct from dreams — clearer, more vivid, and more real. Dreams do not produce veridical perception of events in other locations.

Expectation and cultural conditioning: People see what they expect to see — Christians see Jesus, Hindus see Hindu deities, etc. Problem: many NDErs report encountering things they did not expect. Atheists who expected nothing encounter a being of light. Christians encounter a loving Jesus when they expected a stern judge. Children too young to have cultural conditioning report the same core features as adults. And the cross-cultural consistency documented by Osis-Haraldsson, Van Lommel, and others undermines the cultural-conditioning hypothesis. If NDEs were shaped primarily by cultural expectation, we would expect Indian NDErs to report dramatically different experiences from American NDErs — yet the core features (light, peace, deceased relatives, life review, a border or boundary) appear across cultures with remarkable consistency.

False memory / confabulation: The NDE is constructed after the fact by a brain trying to make sense of a period of unconsciousness. Problem: verified veridical information rules out confabulation, and NDE memories are remarkably stable over time — unlike confabulated memories, which tend to change with each retelling. As noted above, Van Lommel's follow-up interviews at two and eight years showed that NDE memories remained vivid and consistent, a pattern that is characteristic of memories of real events, not fabricated ones.

Depersonalization or dissociation: Some researchers have suggested that NDEs are a form of psychological dissociation — a defense mechanism in which the mind detaches from the body during extreme stress. Problem: dissociative experiences are typically described as dreamlike, unreal, and detached — the person feels as though they are watching their life from behind glass. NDEs are the exact opposite: they are described as "realer than real," with heightened clarity, vivid perception, and a sense of profound connection. Long's NDERF data confirms this — the overwhelming majority of NDErs describe their experience as more real than ordinary waking consciousness, not less. This is the opposite of what dissociation theory predicts.

Here is the critical point that all these naturalistic explanations share: none of them can explain veridical information. Not one. If a patient who was clinically dead with a flat EEG accurately describes events occurring in other rooms of the hospital, oxygen deprivation cannot explain it. DMT cannot explain it. Temporal lobe stimulation cannot explain it. Cultural conditioning cannot explain it. The only explanation that accounts for veridical NDEs is that the patient's consciousness was actually functioning independently of the brain — perceiving real events from a vantage point outside the body. And that is exactly what substance dualism predicts and physicalism cannot accommodate.⁴³

We will examine these explanations in full detail in Appendix B. For now, keep this principle in mind: the gold standard is veridical evidence, and no naturalistic explanation has successfully accounted for it.

The Role of the Researcher's Worldview

I want to say one more thing about methodology, because I think it matters enormously. Every researcher — whether studying NDEs, cancer treatments, or quantum mechanics — brings a worldview to their work. Nobody approaches evidence from a position of perfect neutrality. The question is not whether a researcher has a worldview, but whether they are honest about it and whether they allow the evidence to challenge their assumptions.

Miller makes this point forcefully in his dissertation. He entered his research on deathbed experiences not as a lifelong believer in the supernatural, but as someone whose views had been shaped largely by the prevailing academic skepticism of his training. His engagement with the evidence changed his perspective — not because he abandoned critical thinking, but because the evidence compelled him to update his beliefs. He describes this process as something akin to a paradigm shift: the data did not fit the old paradigm, and intellectual honesty required him to consider a new one.⁴⁴

Sabom's story is similar. He began as a skeptic who thought NDE reports were "hogwash." But after systematically comparing patients' NDE descriptions with their actual medical records, he could no longer dismiss what he was seeing. The data was too accurate, too specific, too consistent. Sabom did not abandon his critical faculties — he used them more rigorously than ever. But he followed the evidence where it led.⁴⁵

On the other side, we must be honest about the fact that some NDE researchers come to the subject with strong prior beliefs — whether religious or anti-religious — that may color their interpretation of the data. A researcher who is already convinced that the afterlife exists may unconsciously weight positive evidence more heavily. A materialist researcher who is philosophically committed to the view that consciousness cannot exist without a functioning brain may unconsciously dismiss veridical evidence that challenges that commitment. Miller's dissertation carefully documents how some prominent skeptics of NDEs and the afterlife have failed to engage with the actual research literature — sometimes showing no evidence of having even read the studies they dismiss.⁴⁶

The antidote to bias — on both sides — is methodological rigor, transparency, and peer review. And this is precisely what the best NDE research provides. When a study is published in The Lancet, it has been scrutinized by independent expert reviewers who have no personal stake in the outcome. This does not guarantee perfection, but it is the best system we have for catching errors, biases, and unfounded claims.

As I approach this evidence, I want to be transparent about my own convictions. I believe that the cumulative weight of NDE research — especially the veridical evidence — provides strong support for the reality of the soul, the afterlife, and the truth of the biblical teaching that the soul survives the death of the body. I hold this conviction not because I adopted it uncritically, but because I believe the evidence warrants it. I also hold it as a Christian who affirms the authority of Scripture and the historic creeds of the church. But I am committed to fairness: every skeptical argument deserves a charitable hearing, and every piece of evidence deserves honest evaluation. I invite you, the reader, to hold me to that standard throughout this book.

The Media Problem: Why Public Perception Is Skewed

Before we close this chapter, I want to address a problem that distorts public understanding of NDEs. The problem is the media. Television, newspapers, magazines, and social media give disproportionate attention to the most dramatic, controversial, and sensational NDE stories — precisely the stories that are least representative of the research literature.

Sabom describes his "increasing unrest with discussions of the NDE in the media" as one of the factors that motivated his Atlanta Study.⁴⁷ The media loves stories that are spectacular and divisive — a child who visited heaven, a neurosurgeon who met God, a controversial figure who claims to have received cosmic secrets. These stories generate clicks, sell magazines, and fill television segments. But they are not representative of the thousands of carefully documented NDEs in the research literature.

The result is that most people's understanding of NDEs is shaped by the least reliable evidence (popular books and media coverage) rather than the most reliable evidence (prospective hospital studies and peer-reviewed research). This creates a vicious cycle: skeptics dismiss NDEs based on the weakest examples, while believers embrace NDEs based on the most dramatic stories, and neither group engages with the actual scientific evidence.

Consider what happens when the media picks up a fraudulent NDE story like the Malarkey case. The exposure of the fraud becomes front-page news, and millions of people conclude, "See? NDE stories are all made up." But those same millions never hear about Van Lommel's Lancet study, Sabom's Atlanta Study, or Parnia's AWARE research — because rigorous science does not generate clicks the way scandals do. The irony is painful: the strongest NDE evidence gets the least public attention, while the weakest gets the most.

The reverse problem also occurs. When a dramatic NDE book becomes a bestseller — as happened with both Heaven Is for Real and Proof of Heaven — millions of readers accept the account uncritically because it is emotionally compelling and affirms what they want to believe. They do not ask about methodology, control groups, or veridical verification. They do not notice that Alexander's theological conclusions contradict the Bible at multiple points. They are moved by the story, and that is enough. But emotional resonance is not the same as evidential strength. A story can be deeply moving and still be unreliable — or it can be methodologically dry and still be enormously important. The wise reader learns to distinguish between these.

This is why Tabatt's work in The NDE Conspiracy is so valuable. Tabatt does not dismiss NDEs. He takes them seriously as a Christian. But he insists on discernment — on the ability to separate the genuine from the counterfeit, the wheat from the tares. As he notes, the NDE space attracts not only genuine experiencers and honest researchers, but also charlatans, New Age teachers, occult practitioners, and confused individuals whose interpretations of their experiences contradict basic biblical teaching.⁴⁸ We need the tools to navigate this landscape wisely. And that is precisely what this chapter — and this book — aims to provide.

This book aims to break that cycle. In every chapter, I will ground the discussion in the professional research literature — the studies conducted by trained physicians and academics, published in peer-reviewed journals, and held to the highest standards of evidence. Popular accounts will be used to illustrate points, but they will never be the foundation of the argument. The foundation is the data. And the data, as we will see in the chapters ahead, is remarkable.

Conclusion: The Tools Are in Your Hands

We have covered a lot of ground in this chapter. Let me summarize the key principles that should guide your evaluation of any NDE evidence you encounter:

First, NDE research is a legitimate field of scientific inquiry. It has been conducted by credentialed medical professionals, using rigorous methodologies, and published in peer-reviewed journals. The claim that it is "unscientific" reflects ignorance of the literature.

Second, not all NDE evidence is equal. Prospective hospital studies are the gold standard. Retrospective research is valuable but has limitations. Self-reported databases like NDERF are useful but require caution. Popular testimonial books are the least reliable category and should never be the primary basis for evaluation.

Third, veridical evidence is the game-changer. When a clinically dead patient accurately reports events they could not have known through normal sensory channels, we have moved beyond subjective experience into the realm of verifiable fact. No naturalistic explanation has successfully accounted for veridical NDEs.

Fourth, watch for red flags. The Gray Scale developed by Miller and Gray provides a practical checklist for evaluating any NDE claim. The more red flags an account raises, the more caution you should exercise.

Fifth, be honest about worldview commitments — your own and those of the researchers you read. Nobody approaches this evidence from perfect neutrality. The best protection against bias is methodological rigor, transparency, and a genuine willingness to follow the evidence wherever it leads.

Sixth, remember that the media is not your friend when it comes to understanding NDEs. Television, social media, and popular publishing are designed to entertain and sell — not to inform with precision. Ground your understanding in the professional research literature, and treat sensational media coverage with appropriate skepticism.

I want to close with a personal reflection. When I first began studying NDE research, I expected to find either a slam dunk for the afterlife or an embarrassing collection of wishful thinking. What I actually found was something far more interesting and far more nuanced: a body of evidence that is imperfect but serious, incomplete but impressive, and deeply consistent with what the Bible has always taught about the soul, the afterlife, and the God who made us. The evidence does not answer every question. It does not prove the afterlife with mathematical certainty — no empirical evidence can do that. But it does what good evidence always does: it shifts the burden of proof. After engaging honestly with the prospective hospital studies, the veridical cases, the cross-cultural data, and the profound aftereffects documented in study after study, the question is no longer "Is there any reason to think NDEs are real?" The question has become "Is there any adequate reason to think they are not?"

Armed with these tools, you are now equipped to do something that most people — including most Christians — have never done: engage with the NDE evidence directly, critically, and honestly. In the chapters that follow, we will put these tools to work as we examine the most powerful evidence in the NDE literature — starting, in Chapter 6, with the veridical cases that have no adequate naturalistic explanation, and continuing, in Chapters 7 and 8, with the Pam Reynolds case and the extraordinary evidence of blind people who see during their NDEs.

But first, in Chapter 4, we will turn to a closely related phenomenon that provides powerful complementary evidence: deathbed experiences — the visions of the dying as they stand at the very threshold of eternity.

The evidence awaits. Let us examine it together.