Practitioners of astral travel insist that the experience must be real because it seems so vivid, and because some of the experiences are similar, even for people from different cultures. But it is not surprising that many people who have astral projected have similar experiences, after all, that is what the term "guided imagery" is: when an authority tells another what they should expect from the experience.
It may be a profound experience, but the fundamental problem is that there is really no way to scientifically measure whether or not a person's spirit leaves or enters the body. The simplest and best explanation for out-of-body experiences is that the person is merely fantasizing and dreaming. Because there is no scientific evidence that consciousness can exist outside of the brain, astral projection is rejected by scientists.
Why has astral projection not been proven scientifically? Some claim it is because mainstream scientists are closed-minded and refuse to even look at evidence that does not fit their narrow worldview. However, in science those who disprove dominant theories are rewarded, not punished. Proving the existence of psychic powers, astral projection or alternative dimensions would earn the dissenting scientists a place in the history books, if not a Nobel Prize.
Scientifically testing the validity of astral travel should be quite simple; for example, you might hide ten unknown objects at different locations and then ask a person to project their consciousness to each place and describe exactly what is there. Either the descriptions match or they do not.
According to researcher Susan Blackmore, author of "Beyond the Body: An Investigation of Out-of-the-Body Experiences," people who experience astral travel "have been found to score higher on measures of hypnotizability and, in several surveys, on measures of absorption, [a] measure of a person's ability to pay complete attention to something and to become immersed in it, even if it is not real, like a film, play, or imagined event." Out-of-body experiencers are more imaginative, suggestible, and fantasy-prone than average, though have low levels of drug and alcohol use, and no obvious signs of psychopathology or mental illness.
In 2021, the Medical Science journal Cureus published a paper entitled "Astral Projection: A Strange Out-of-Body Experience in Dissociative Disorder" which examined a purported case of Astral Projection in a 15 yr-old boy. The paper detailed the many possible causes of out of body experiences, stating: "The literature on the cause of OBE mainly entails various neurological conditions like epileptic seizures and migraine, deficient visual, vestibular, and multisensory processing, near-death experiences, and psychedelic drug use.
These peculiar experiences have been described as secondary to the psychopathology of psychiatric disorders such as schizophrenia, personality disorders, depersonalization, anxiety, dissociative disorders, and depression". When discussing the particular case the paper was examining, the authors stated that the patient had frequently ran away from home, as well as having "shown decreased social interest, irritability, and persistent sadness of mood for the past two to three months" according to the report.
Having ran away, the patient would often assume the identity of an 18 year-old electrician and it was during one such event that he had what appeared to be an out of body experience. They concluded that due to his circumstances the patient was mostly likely in a dissociative state and that in this case: "astral projection can be construed as a part of the dissociative experience"
Yet there are other possible causes of out-of-body experiences and astral projection. In 2017, a study reported on by The Atlantic analysed some 210 patients who suffered with vestibular disorders. The Vestibular system within the inner ear is responsible for providing the body with its sense of balance and issues relating to this system can result in a sense of floating. Questioning the patients, it was discovered that some 14% reported out of body experiences compared to the 5% without any form of vestibular issues.
We need not resort to such artificial tests, since the real world provides countless opportunities for astral projection to be demonstrated beyond any doubt.