Americans are broadly skeptical about each of eight paranormal phenomena tested in a recent Gallup poll. Nearly half of U.S. adults, 48%, believe in psychic or spiritual healing. Slightly fewer, 39%, express a belief in ghosts, while between 24% and 29% say they believe in six other supernatural phenomena, including telepathy, communication with the dead, clairvoyance, astrology, reincarnation and witches.