By Dr. Joel Ramsey, The Paranormal Professor

Most people encounter ectoplasm for the first time through a 1984 comedy. The image is difficult to shake: Slimer leaving a trail of luminescent green across a hotel hallway, Bill Murray wearing it on his face. The word itself has become shorthand for the cartoonish version of the paranormal, something sticky and fluorescent and safely fictional. But the actual history of ectoplasm is far stranger than anything Hollywood invented, and far more revealing about the human mind than most people realize. It begins not with a ghost but with a Nobel Prize-winning scientist, a controversial Italian medium, and a culture so desperate for proof of life after death that some of the most rigorous researchers of the nineteenth century convinced themselves they were watching the impossible happen directly in front of them.

A Movement Built on Need

To understand ectoplasm, you have to understand the world that created it. Modern spiritualism is generally traced to 1848, when two sisters named Kate and Maggie Fox, living in Hydesville, New York, claimed to communicate with spirits through a system of rapping sounds. Their story spread with extraordinary speed, igniting a movement that swept across North America and Europe and made séances a fixture of respectable middle-class life. By the 1890s, spiritualist gatherings were being held in major cities on both continents, drawing participants from every station of life, including scientists, physicians, clergy, and political figures (Britannica, n.d.).

This was not a fringe phenomenon. It was culturally mainstream, and at its center was a profound and deeply human need: the desire for evidence that consciousness survived physical death. What I find most important about this moment in history is that the people drawn into it were not credulous by nature. Many of them were intellectually serious, scientifically minded, and deeply skeptical of claims they could not examine directly. But they had also, in many cases, lost someone. The American Civil War had ended less than a decade before spiritualism peaked. Grief was not an abstraction. It was the organizing reality of millions of lives, and spiritualism offered something that neither medicine nor theology had been able to provide: a testable claim, a physical encounter, something you could sit in a room and witness for yourself.

That hunger for physical evidence is the precise context in which ectoplasm was born. And that context matters, because it tells us something about the investigators who pursued it as much as it tells us about the mediums who produced it.

The Scientist Who Named It

The word "ectoplasm" was coined in 1894 by the French physiologist Charles Richet, during séances he conducted with the Italian medium Eusapia Palladino (Moon Mausoleum, 2023). What makes this moment significant is not merely that someone invented a term. It is who invented it. Richet was not a credulous amateur. He was one of the most decorated scientists in Europe, a researcher whose work on anaphylaxis would earn him the Nobel Prize in Physiology or Medicine in 1913 (Office for Science and Society, McGill University, n.d.). When a man of that stature examined a medium and concluded that something physically inexplicable was occurring, the scientific community paid attention.

What fascinates me about Richet is not that he believed, but why he believed. He was not a spiritualist. He did not think the substance he observed was supernatural in origin. He thought it was a physical projection from the medium's own body, a third category of matter beyond what science had yet classified, and he approached it the way any serious scientist would approach an anomaly: with the assumption that it needed explanation rather than dismissal. He derived the term from the Greek words for "outside" and "something formed," and he spent years trying to understand what he was seeing.

Palladino herself was a fascinating and deeply complicated figure. She was an Italian medium of working-class origins who had been producing physical phenomena at séances since the 1870s, and she attracted the attention of scientists across Europe, not because she was easy to believe, but because she was difficult to fully dismiss. Investigators who sat with her reported levitating tables, materialized hands, and a presence in the room that went beyond anything they could explain by ordinary means. She was also caught cheating on multiple occasions, which she acknowledged openly, claiming her sitters had essentially willed her to deceive them. That explanation may sound absurd, but the dynamic she was describing is one that researchers in perception and social psychology have since documented in considerable detail.

What the Evidence Actually Showed

When investigators examined ectoplasmic samples under controlled conditions, the results were consistent and deflating. The materials identified included cloth soaked in potato starch, paper, gauze, and egg white, substances that could be concealed in body cavities and produced at the appropriate moment in dim lighting (The Ghostly Portal, n.d.). Photography, which believers hoped would confirm the phenomenon, became one of the primary tools of exposure. When séance rooms were properly lit, and investigators were permitted to conduct physical searches before and after sessions, the materializations reliably disappeared.

The case of the medium known as Margery, investigated during the 1920s, remains one of the most instructive in the literature. A supposedly materialized spirit hand produced fingerprints in wax during her séances that were later found to match the fingerprints of her living dentist, who had attended an earlier sitting (National Science and Media Museum, n.d.). The ensuing controversy, with investigators accusing each other of tampering and bad faith, tells us as much about the investigation as about the medium. By that point, careers, reputations, and deeply held beliefs were all implicated in the outcome. Clean objectivity was no longer fully available to anyone in the room.

Harry Houdini, who attended séances as a trained illusionist and methodical skeptic rather than as a believer, made an observation during congressional testimony in 1926 that I find myself returning to regularly in my own work. His argument was that specialized expertise could actually become a liability in these settings. A physiologist watching a séance is not in a laboratory. He is in a darkened room, emotionally invested in the outcome, surrounded by others who share that investment, and operating far outside the controlled conditions that make scientific observation reliable. The more a researcher knew about physiology and the less he knew about stagecraft, the more vulnerable he became to a skilled performer working in exactly that gap.

Why Intelligent People Saw What They Saw

This is the question that interests me most about the ectoplasm phenomenon, and it is the question I think gets lost when the conversation collapses into simple fraud or simple belief. The mediums were almost certainly deceiving their audiences. But the audiences, including some of the most educated and scientifically rigorous people of the era, were also doing something that had nothing to do with gullibility in the ordinary sense.

The séance room was a communication environment before it was anything else, and like all communication environments, it shaped what people were able to perceive, report, and remember. Consider what that environment contained: near-total darkness, physical contact between participants, a shared and emotionally charged belief system, a skilled performer directing attention, and the weight of collective expectation pressing down on every person in the room. Research on suggestibility has established that indirect suggestion, the kind that operates through environmental framing rather than through explicit instruction, can profoundly alter what people report experiencing, even when no deliberate deception is involved (The Decision Lab, n.d.). Add deliberate deception to that environment, and the conditions for manufactured experience become remarkably reliable.

What makes the séance setting particularly powerful is that it worked not by overwhelming the critical mind but by redirecting it. Confirmation bias, the well-documented tendency to seek out and weigh evidence that supports what we already believe, means that a researcher who enters a séance hoping to witness materialization will interpret ambiguous observations through that lens almost automatically. The dim light becomes suggestive rather than suspicious. The brief contact of something against the skin becomes confirmation rather than coincidence. Greyson (2014) notes that people consistently fail to perceive unexpected stimuli in their visual field when attention is directed elsewhere, and prior expectation is among the most powerful determinants of what actually registers in conscious awareness. In a séance room, with a skilled performer controlling where attention goes, a great deal can occur at the periphery without being registered by anyone present.

I have spent fifteen years investigating locations and experiences that people describe as paranormal, and this dynamic is one of the most important things I have learned in that time. The experience of witnessing something extraordinary is real, even when the extraordinary thing itself is not. That is not a contradiction. It is a description of how perception actually works under conditions of high expectation, emotional investment, and environmental manipulation. The people in those séance rooms were not seeing things because they were weak. They were seeing things because they were human.

What Ectoplasm Actually Tells Us

Ectoplasm as a physical substance does not appear to exist. No sample has ever withstood scientific scrutiny, and no controlled investigation has produced verifiable evidence of materialization. Slimer is fiction. The gauze emerging from Eusapia Palladino was gauze.

But the phenomenon of credible and intelligent people reporting impossible things in charged social settings is not only real, it is one of the most well-documented and theoretically coherent areas in the psychology of perception. That is the story worth telling.

The real mystery of ectoplasm was never whether spirits produced it. The real mystery is how easily intelligent people, scientists included, begin to see extraordinary things when hope, grief, expectation, and social pressure converge in the same room at the same time. In that sense, ectoplasm still exists. Not as a supernatural substance, but as a reminder of how deeply human beings want to believe that death is not the end, and of how powerfully that wanting can shape what we see, what we report, and what we are willing to call evidence.

Richet was not fooled because he was careless. He was moved because he was human. And that, more than anything else he left behind, may be the most useful thing his story has to offer.

References

Britannica. (n.d.). Ectoplasm. https://www.britannica.com/topic/ectoplasm-occultism

Greyson, B. (2014). Inattentional blindness and expectancy in paranormal perception. Journal of Near-Death Studies, 32(3), 123–142.

Moon Mausoleum. (2023). Spiritualism and the occult: The history of ectoplasm and gooey ghosts. https://moonmausoleum.com/history-of-ectoplasm

National Science and Media Museum. (n.d.). Using science to investigate the paranormal. https://www.scienceandmediamuseum.org.uk

Office for Science and Society, McGill University. (n.d.). This French physician's career could be defined by the word 'ectoplasm'. https://www.mcgill.ca/oss/article/history-quackery/french-physicians-career-could-be-defined-word-ectoplasm

The Decision Lab. (n.d.). Suggestibility. https://thedecisionlab.com/biases/suggestibility

The Ghostly Portal. (n.d.). Ectoplasm: The ghostly substance that bridged worlds. https://www.theghostlyportal.com