Lucid dreaming is the experience of knowing that you are dreaming while the dream is still happening, often with some ability to steer what happens next. It is a verified state of sleep: since the 1970s, lucid dreamers in sleep laboratories have signalled researchers from inside REM sleep using pre-agreed eye movements. Astral projection is a different claim, the belief that a conscious "astral" body can leave the physical one and travel; the experience is widely reported, but the idea that anything actually leaves the body has not been verified.
The two are often lumped together. Lucid dreaming is one of the few states of consciousness that can be measured in real time, which makes it a meeting point for sleep scientists, meditation traditions and anyone curious about their own mind. Astral projection sits at the edge of that territory, where the experience is vivid and consistent across cultures but its interpretation is openly contested. Both belong to the questions covered in the [consciousness topic hub](/topics/consciousness).
What is lucid dreaming?
Lucid dreaming is a dream in which the dreamer realises "this is a dream" without waking up. The recognition can flicker briefly or last long enough to fly, change the scene or speak to dream characters. Control is common but not required; the defining feature is awareness.
The experience is old. Aristotle, in his short treatise On Dreams, noted that during sleep something in consciousness sometimes declares that what presents itself is only a dream. In 1867 the Marquis d'Hervey de Saint-Denys published Les Rêves et les moyens de les diriger (Dreams and How to Guide Them), a record of his own dream experiments. The term itself came from the Dutch psychiatrist Frederik van Eeden, whose 1913 paper "A Study of Dreams" in the Proceedings of the Society for Psychical Research described "lucid dreams" as ones in which the sleeper keeps full recollection of waking life.
It is also common. A 2016 meta-analysis of survey data by Saunders and colleagues estimated that around 55 per cent of people report at least one lucid dream in their lifetime, with a smaller share having them regularly.
How scientists proved lucid dreaming is real
Lucid dreaming was proven by having dreamers send a signal from inside sleep. Dream reports are given after waking, so a skeptic could always argue that the "lucidity" was reconstructed in the first moments awake.
The solution relied on a quirk of REM sleep: most of the body's muscles are effectively switched off, but the eyes still move. In 1975 the psychologist Keith Hearne at the University of Hull arranged with an experienced lucid dreamer, Alan Worsley, that Worsley would make a deliberate series of left-right eye movements once he became lucid. The signals appeared on the recording while the EEG showed REM sleep. Working independently, Stephen LaBerge at Stanford University used the same logic in his doctoral research, published in 1981, which brought the finding to a wide scientific audience.
The most striking recent step came in 2021. A team led by Karen Konkoly, with laboratories in the United States, France, Germany and the Netherlands, reported in Current Biology that researchers could put questions, including simple arithmetic, to lucid dreamers through sounds, lights or touch. Some dreamers perceived the questions inside the dream and answered correctly with eye movements or facial muscle signals while still asleep.
What happens in the brain during a lucid dream
Brain studies show that lucid dreams combine the physiology of REM sleep with increased activity in regions linked to self-reflection. In 2009 Ursula Voss and colleagues recorded EEG from lucid dreamers and found heightened frontal activity compared with ordinary REM sleep, a pattern that in some respects resembled waking.
In 2012 Martin Dresler and colleagues combined EEG and fMRI to compare lucid and non-lucid REM sleep in an experienced lucid dreamer. During lucidity, areas including the frontopolar and dorsolateral prefrontal cortex and the precuneus became more active, regions associated in waking studies with metacognition, the ability to think about one's own thinking. The picture that emerges is simple: a lucid dream is still generated by the sleeping brain, but with some of the reflective machinery of waking consciousness switched back on. The samples are small, so the details remain provisional.
How people learn to lucid dream
The techniques with the best research support are reality testing, mnemonic induction (MILD), wake-back-to-bed (WBTB) and the senses-initiated method (SSILD). None guarantees success, and most people need practice.
- Reality testing. Several times a day, the practitioner asks "am I dreaming?" and checks something that behaves differently in dreams, such as rereading a line of text. The habit tends to carry into dreams, where the check fails and prompts recognition.
- MILD. Developed by LaBerge, it involves waking from a dream, rehearsing it, and falling back asleep with a firm intention to recognise the next dream as a dream.
- Wake-back-to-bed. The sleeper wakes after several hours, stays up briefly, then returns to sleep, placing the intention close to the longer REM periods of late night.
- SSILD. The practitioner cycles attention gently through sight, sound and bodily sensation while falling back asleep.
Denholm Aspy at the University of Adelaide has run the most useful comparisons. His 2017 study found that combining reality testing, wake-back-to-bed and MILD worked better than reality testing alone, and his larger international study published in 2020 found MILD and SSILD broadly similar when paired with a brief return to sleep. A dream journal, which improves recall, is a common foundation.
Two cautions belong here. Methods that interrupt sleep are best used occasionally, and ordinary sleep habits, a regular schedule and enough total sleep, come first. Some laboratory studies have tested prescription medication for induction; that is clinical research, not a home technique, and this article does not recommend any substance.
Tibetan dream yoga
Tibetan dream yoga is a contemplative practice that uses awareness within dreams as a path to recognising the nature of mind. It is one of the Six Yogas of Naropa, practices associated with the 11th-century Indian master Naropa and carried into Tibet by Marpa and his student Milarepa.
The goal differs from most modern lucid dreaming. The dream yogi uses recognition of the dream to see that waking experience, too, is shaped by the mind, and teachers such as Tenzin Wangyal Rinpoche, in The Tibetan Yogas of Dream and Sleep, present the practice as preparation for the bardo after death. The technical overlap with MILD is notable: both rest on intention set before sleep.
What is astral projection?
Astral projection is the belief that a person's consciousness, carried in a subtle or "astral" body, can separate from the physical body and travel. The experience people describe usually begins at the edge of sleep: vibrations, a buzzing sound, a sense of floating, then the impression of seeing one's own body from outside.
The idea has deep roots. Ancient Egyptian religion described the ba, often depicted as a human-headed bird, as an aspect of the person that could move between the tomb and the world of the living. The phrase "astral body" comes from Theosophy, the movement co-founded by Helena Blavatsky in 1875, whose writers described a series of subtle bodies and planes; the same literature popularised the idea explored in the site's guide to [the Akashic Records](/the-akashic-records-explained-origins-what-people-claim-and-how-to-think-about-them). In 1929 Sylvan Muldoon and Hereward Carrington published The Projection of the Astral Body, one of the first practical manuals.
The modern revival owes most to Robert Monroe, a radio executive whose 1971 book Journeys Out of the Body described his own experiences. Monroe founded the Monroe Institute in Virginia and developed Hemi-Sync, audio recordings using binaural beats intended to guide listeners into specific states. William Buhlman's Adventures Beyond the Body later extended the practical literature.
What science says about out-of-body experiences
Science treats out-of-body experiences (OBEs) as real experiences generated by the brain, not as evidence that consciousness leaves the body.
Three lines of evidence stand out. In 2002 Olaf Blanke and colleagues reported in Nature that electrical stimulation of the right angular gyrus, part of the temporoparietal junction, produced out-of-body sensations in a patient being assessed for epilepsy surgery. In 2007 two teams, led by Henrik Ehrsson and Bigna Lenggenhager, showed in Science that virtual-reality setups mismatching sight and touch could make healthy volunteers feel their self was located outside their body. And sleep research links many OBE reports to sleep paralysis and hypnagogic states, where dream imagery intrudes on partial wakefulness; the vibrations and floating described in projection manuals match those reports closely.
The harder question is whether anyone has brought back verifiable information from outside the body, and no controlled study has shown it. The AWARE studies led by Sam Parnia, published in 2014 and 2023, placed hidden visual targets in hospital areas where cardiac arrests were likely, so that any patient reporting an out-of-body view could be tested. Some survivors reported awareness during resuscitation, but neither study produced a verified identification of the targets. A related set of claims is examined in the guide to [remote viewing and the Stargate program](/remote-viewing-explained-the-stargate-program-the-science-and-how-it-is-practiced). The fair summary: the experience is real and often profound, while its interpretation remains contested.
Lucid dreaming vs astral projection: the difference
The core difference is the claim being made. Lucid dreaming claims only that you are aware inside a dream your brain is producing, and that has been verified in the laboratory. Astral projection claims that awareness has left the body and is perceiving a real environment, and that has not been verified.
In practice the two overlap. Both are most often reached at the boundary of sleep and waking, both are trained with intention and relaxation, and many practitioners find that a lucid dream can shift into what feels like an out-of-body state, or the reverse. Some researchers, LaBerge among them, have argued that many projection experiences are best understood as a form of lucid dreaming; many practitioners reply that the two feel distinctly different from the inside. The phenomenology overlaps, and the question of what, if anything, travels is still open.
Billy Carson's reading
Billy Carson approaches both states as practices of consciousness rather than curiosities of sleep. His broader framework, developed across his books, 4BK TV and the podcast, holds that consciousness is primary rather than a by-product of brain chemistry, and he presents that as his interpretation rather than as established science. From that position he treats astral projection as something to be explored through practice, and he teaches it through guided meditation.
The clearest example is his Meditation Monday series, which includes the session "Meditation Mondays - Astral Projection with Billy Carson" on the 4biddenknowledge Podcast Network's YouTube channel. Guided meditation of this kind rests on relaxation and focused attention, which overlap with the intention-setting the research uses for lucid dreaming. His meditation teaching also works with pineal gland and "third eye" symbolism; readers can compare that view with the physiology in [the pineal gland explained](/the-pineal-gland-explained-what-it-does-what-it-does-not-and-why-it-fascinates) and the practice in [how to open your third eye](/how-to-open-your-third-eye-pineal-gland-meditation). The same emphasis on focused intention runs through his teaching on manifestation, gathered in the [manifestation hub](/topics/manifestation).
A skeptic can set the metaphysics aside: guided relaxation and pre-sleep intention are what the evidence-based techniques ask for anyway.
Watch, read and go deeper
The guided sessions are collected in the [meditation series on 4BK TV](/watch/meditation), the natural next step for anyone who wants to practise alongside Billy. The [Awaken Zone](/watch/awaken-zone) series on 4BK TV is another place to continue. The [consciousness topic hub](/topics/consciousness) gathers every related article, from the pineal gland to remote viewing and the Akashic Records.
Frequently asked questions
Is lucid dreaming scientifically proven?
Yes. Since Keith Hearne's work at the University of Hull in 1975 and Stephen LaBerge's at Stanford, lucid dreamers have signalled from verified REM sleep using pre-agreed eye movements. In 2021 a study in Current Biology showed some dreamers could answer researchers' questions in real time while still asleep.
Is astral projection the same as lucid dreaming?
Not quite. Lucid dreaming means being aware that you are inside a dream your brain is producing. Astral projection claims that consciousness has left the body and is perceiving a real place; the experience is widely reported, but that claim has not been verified.
How common is lucid dreaming?
Fairly common. A 2016 meta-analysis of survey studies estimated that around 55 per cent of people have had at least one lucid dream.
What causes out-of-body experiences?
Research links them to how the brain combines vision, touch and balance to place the self in the body. Stimulation of the temporoparietal junction, virtual-reality illusions and sleep paralysis have all produced out-of-body sensations. Whether anything more is involved remains a matter of interpretation.
What is a good technique for a first lucid dream?
Studies by Denholm Aspy and colleagues found that MILD combined with a brief wake-back-to-bed period works for many beginners, and that SSILD performs similarly. A dream journal to improve recall is a useful starting point, alongside a regular sleep schedule.
Sources and further reading
- Stephen LaBerge and Howard Rheingold, Exploring the World of Lucid Dreaming (1990)
- Frederik van Eeden, "A Study of Dreams", Proceedings of the Society for Psychical Research (1913)
- Konkoly et al., "Real-time dialogue between experimenters and dreamers during REM sleep", Current Biology (2021)
- Dresler et al., "Neural correlates of dream lucidity obtained from contrasting lucid versus non-lucid REM sleep", Sleep (2012)
- Blanke et al., "Stimulating illusory own-body perceptions", Nature (2002)
- Tenzin Wangyal Rinpoche, The Tibetan Yogas of Dream and Sleep (1998)
- Robert A. Monroe, Journeys Out of the Body (1971)
- Parnia et al., "AWARE—AWAreness during REsuscitation—A prospective study", Resuscitation (2014)
