Alien abduction (also called abduction phenomenon, alien abduction syndrome, or UFO abduction) refers to people reporting the experience of being kidnapped and subjected to physical and psychological experimentation by an alien figure.[1] People claiming to have been abducted are usually called "abductees"[2] or "experiencers". Most scientists and mental health professionals explain these experiences by factors such as suggestibility (e.g. false memory syndrome), sleep paralysis, deception, and psychopathology.[3] Skeptic Robert Sheaffer sees similarity between some of the aliens described by abductees and those depicted in science fiction films, in particular Invaders From Mars (1953).[4]