A recent study published in the journal Dreaming suggests that demonic encounters in nightmares often follow a predictable pattern of escalating threats across multiple nights of dreaming. The research provides evidence that these terrifying dreams are tied to feelings of powerlessness and eerie environmental shifts, shedding light on how the brain processes intense emotional distress during sleep. By tracking dreamers over a two-week period, the findings offer a detailed look at the anatomy of exceptionally severe nightmares.
Scientists Patrick McNamara, John Balch, and Chanel Reed wanted to explore the thematic and psychological associations of demonic content in dreams. “I had noticed in my work on content of nightmares that many participants in those studies reported greater distress when they felt that they encountered something ‘evil’ or demonic in the nightmare,” said McNamara, a professor of psychology at National University, an associate professor of neurology at the Boston University School of Medicine, and co-director of the Cognitive Neuroscience of Religious Cognition (CNRC) Project.
While feeling an evil presence during sleep is a well-documented phenomenon, the specific ways these sinister figures operate within a dream narrative remain largely uncharted. The researchers aimed to identify the progression of these themes, particularly how a single unsettling dream might evolve into a full-blown demonic attack. “It is clinically and scientifically interesting when a specific cognitive content is associated with greater distress as one could potentially use that content as the target for therapeutic intervention,” McNamara told PsyPost.
By collecting an intensive series of sleep diaries, the team hoped to track the evolution of these frightening narratives. They sought to provide an initial framework for understanding the factors associated with these severe nightmares. This foundation tends to help future scientists explore the clinical implications of such dreams, particularly regarding how the mind handles unresolved fear.
To conduct the study, the researchers recruited 124 adult volunteers from the community. These participants were on average forty-four years old, predominantly female, and mostly white. The participants agreed to take part in a two-week longitudinal study from their own homes.
During this period, the volunteers followed their normal sleeping schedules. Every morning upon waking up, they completed surveys on their phones or computers. These surveys asked the participants to report any dreams they could recall.
The volunteers then rated their dream content based on mood and general themes. To do this, they used a structured questionnaire that asks people to score their dreams on various adjectival scales, such as strange versus familiar. The participants also noted if their dreams woke them up during the night.
In addition to the daily surveys, sixty-one of the participants wore a specialized sleep-tracking headband each night. This device measures sleep architecture, which refers to the different stages and cycles of sleep a person goes through, such as light sleep, deep sleep, and rapid eye movement sleep. The headband allowed the researchers to gather objective data on the participants’ brain waves and sleep patterns.
Throughout the two weeks, the participants submitted a total of 1,599 individual dream reports. Highly trained research assistants read each narrative to determine if the recalled content qualified as a nightmare. They looked for specific markers, such as words expressing fear, scenarios posing an immediate threat to the dreamer, or reports of pain.
If a narrative lacked explicit emotion words, the researchers relied on the morning questionnaire ratings to see if the dreamer scored the experience as highly scary or aggressive. Through this process, the team identified 186 nightmares and 112 disturbing dreams. Within this large pool of reports, they searched specifically for demonic content.
The scientists defined demonic content as figures expressing a sense of supernatural evil and a malicious intent to harm the dreamer. They found sixteen dream reports with overt demonic themes and another group of reports with borderline demonic elements. These specific dreams were experienced by eight different participants.
The researchers found that five of the overt demonic dreams were part of a sequential series. This means the participants had a succession of related dreams over several nights that eventually culminated in a nightmare about a demonic attack. The other eleven reports were single-night events that also featured demonic characters.
When analyzing the headband data, the researchers noticed no major differences in sleep stages between nights with demonic dreams and regular nights. The time spent in deep sleep or rapid eye movement sleep remained largely consistent. However, the scientists note that the small number of demonic dreams makes it difficult to draw definitive conclusions about brain wave patterns.
To understand the progression, the researchers looked closely at the specific narratives provided by the participants. For example, one participant experienced a series of dreams that began with a young brunette woman floating up a hill with a malicious smile. Over the next several nights, this female character reappeared in different forms, such as a sharp departmental secretary and later as the dreamer’s own daughter.
As the nights went on, the dream environment underwent what the participant called a dimensional shift. The threatening presence drew physically closer and closer across the dream series. On the final night, a full demonic attack occurred, with the spirit described as pale and remote, directly echoing the floating woman from the very first dream.
“I was not exactly surprised but I was certainly fascinated by the fact that the demonic content, the ‘demon,’ was often announced or appeared as a vaguely threatening character in a regular non-distressing dream days before the onset of its appearance in a nightmare,” McNamara said. “I intend to follow up with this finding in future research.”
Another participant experienced a profound fracturing of identity leading up to her demonic nightmare. In her initial dream, she saw herself in a mirror as an elderly woman living in the nineteenth century, working as a servant. In a subsequent dream, she transformed into a flying flower, yet she still operated as a servant to a supernatural villain.
By the end of her dream series, this theme of servitude culminated in a terrifying scenario. She dreamed she was married to the devil, who was brainwashing her into permanent servitude in a dark, eerie house. These specific cases highlight how feelings of powerlessness and shifting identities pave the way for a demonic encounter.
The qualitative analysis of the broader dream narratives yielded a wealth of detailed thematic patterns. One major pattern revealed that demonic content often announces itself at the very beginning of a dream series. A character might initially appear as a non-threatening agent, but over subsequent nights, this entity transforms into something supernaturally evil.
Another finding suggests the background environment in these dreams tends to feel eerily threatening. The physical setting often undergoes bizarre changes or violates the laws of physics, taking on a distinctly supernatural atmosphere. Dreamers described dark houses, strange dimensional shifts, and shadowy settings.
A third pattern involves the dreamer typically being depicted as entirely powerless. The participants often exhibited a fragile sense of identity, sometimes even transforming into different characters, such as the nineteenth-century woman or the floating flower mentioned previously. This lack of agency leaves the dreamer highly vulnerable to the unfolding threats.
A fourth characteristic shows that the demonic entity consistently displays a strong interest in harming the individual. The demon acts as if it wants to destroy the dreamer physically or obliterate their sense of self. The narratives frequently featured violence, such as being chased by monsters or attacked by malevolent forces.
A fifth pattern highlights a distinct progression of thematic content across the consecutive nights of a dream series. Elements of the demonic figure would randomly reappear in different guises, moving progressively closer to the dreamer. The threat level steadily escalated over time until the final terrifying nightmare occurred.
As a final pattern, the dreamers or their allies often attempted to oppose the demon. Sometimes a parent or a friend in the dream would step between the dreamer and the beast. Sadly, these attempts to fight back or block the malicious actions almost always failed.
The researchers suggest that these findings might relate to how the brain processes emotional memories. When an individual experiences intense fear or stress, the sleep-dependent memory system attempts to process and integrate those emotions over several nights. If the emotional load is too overwhelming, this integration process fails, which provides a pathway for severe nightmares to occur.
People raised in environments with supernatural belief systems might naturally use those concepts to visualize their fears. The brain takes the feeling of a profound, unresolved threat and clothes it in the visual rhetoric of a demonic encounter. The demon acts as a psychological stand-in for overwhelming distress or repressed anxieties.
The study does have a few limitations that warrant consideration. The occurrence of demonic dreams in the sample was relatively rare, which means the quantitative data regarding sleep stages lacks the statistical power needed for broad generalizations. A larger sample of such dreams would help verify if any specific sleep architectures predict these nightmares.
The authors also note that they did not collect data regarding the participants’ media consumption. Popular culture, including horror movies and video games, very likely influences the specific imagery people see in their terrifying dreams. Tracking what media participants consume before bed might explain why certain demonic figures take specific shapes.
Future research could also track medication usage, which was not analyzed in this specific study. Certain drugs are known to alter dream vividness and affect, so incorporating medication information would provide a more complete picture. By expanding on these themes, scientists can continue to piece together the mechanisms behind our most frightening nocturnal experiences.
For those troubled by these intense nocturnal experiences, the findings offer some reassurance. “They are not alone if they experience what they subjectively perceive as ‘evil’ content; if the demonic content persists seek help from sleep medicine experts experienced in treating nightmares,” McNamara said.
The study, “The “Demonic” in Dreams and Nightmares,” was authored by Patrick McNamara, John Balch, and Chanel Reed.