Parapsychology is the study of alleged psychic phenomena (extrasensory perception, as in telepathy, precognition, clairvoyance, psychokinesis, a.k.a. telekinesis, and psychometry) and other paranormal claims, for example related to near-death experiences, synchronicity, apparitional experiences, etc. It is considered to be pseudoscience by a vast majority of mainstream scientists, in part because, in addition to a lack of replicable empirical evidence, parapsychological claims simply cannot be true "unless the rest of science isn't."
Parapsychology research is largely conducted by private institutions in several countries and funded through private donations, and the subject almost never appears in mainstream science journals. Most papers about parapsychology are published in a small number of niche journals. Parapsychology has been criticised for continuing investigation despite being unable to provide convincing evidence for the existence of any psychic phenomena after more than a century of research.