In ufology, an abductee is someone who has reportedly been kidnapped by aliens, usually for the purpose of examination and experimentation. Abductees often have a lapse of memory for the period they were held captive. This period is referred to by UFO investigators as missing time, and is a hallmark of the abduction experience. The best abduction reports also include the conscious recollection of a UFO sighting prior to the missing time, accompanied by other UFO reports during the same period by credible witnesses in the same vicinity.