Hopkins is often credited with popularizing the idea of alien abductions as genetic experimentation through the publication of his book Intruders.
He has been dubbed "father of the abduction movement" by some.

Hopkins, along with Elizabeth Slater who conducted psychological tests of abductees, likened these experiences to rape, specifically for the purpose of human reproductive capabilities.
In fact, Hopkins was inclined to dismiss his clients' conscious memory of abuse for more alien explanations.
He was an alarmist, rather than a spiritualist, in his approach to the alien visitations, believing the visitations to be apocalyptic and that no good could come of these encounters.
He described victims' experiences as severe and nightmarish.

While both men and women reported to Hopkins abductions by aliens that included sexual encounters, allegedly for some form of extraterrestrial eugenics, women in particular seemed to be a part of a "highly technological colonization scheme."
These victims were, reportedly, taken to spaceships, impregnated by extraterrestrials, then later as the hybrid baby developed, returned to the ship to have the fetus removed and given up to the alien parent.
The alien parents, purportedly, had the ability to communicate telepathically with their child.
On occasion, according to victims' reports as told by Hopkins, the human parents were allowed to see their human-alien hybrid, or transgenic, children.
Once a victim, according to Hopkins, abductees were powerless over the intrusions and susceptible to additional kidnappings which may extend to their (human) children. "
If people have had one abduction experience," Hopkins said," then they will have others."

Critics of Hopkins' assertions about alien abductions contend that the alien abduction phenomenon is not as mysterious as Hopkins makes it out to be.
Much of the phenomenon can, according to researchers such as Ronald K. Siegel of the University of California, Los Angeles, be explained as the consequence of "normal hallucinatory powers of the brain."

Sleep paralysis, for example, can produce the feeling that one is paralyzed or has difficulty moving.
It can also produce the effect of floating or the sense of an out-of-body experience.
Sleep paralysis occurs in a transition time and the person is in a dream-like state, hallucinations can occur just before falling asleep (hynogogic hallucination) or just after (hypnopompic hallucination).
These hallucinations feel real to the person experiencing sleep paralysis and can often be accompanied by sensory features: musty smells, shuffling sounds, visions of ghosts, aliens, and monsters.
Neuroscientist Michael Persinger of Laurentian University in Greater Sudbury, Ontario, Canada, believes that these sensations can spontaneously occur in some people, given the right set of circumstances, leading to the kind of feelings of "tremendous meaningfulness and fear" sometimes expressed by alleged alien abductees.

Hopkins rejected the idea of sleep paralysis, calling it "the big explanation du jour", and an inadequate explanation for those who experience abductions outside the bedroom.
Hopkins is often credited with popularizing the idea of alien abductions as genetic experimentation through the publication of his book Intruders. He has been dubbed "father of the abduction movement" by some.
Hopkins, along with Elizabeth Slater who conducted psychological tests of abductees, likened these experiences to rape, specifically for the purpose of human reproductive capabilities. In fact, Hopkins was inclined to dismiss his clients' conscious memory of abuse for more alien explanations. He was an alarmist, rather than a spiritualist, in his approach to the alien visitations, believing the visitations to be apocalyptic and that no good could come of these encounters. He described victims' experiences as severe and nightmarish.
While both men and women reported to Hopkins abductions by aliens that included sexual encounters, allegedly for some form of extraterrestrial eugenics, women in particular seemed to be a part of a "highly technological colonization scheme." These victims were, reportedly, taken to spaceships, impregnated by extraterrestrials, then later as the hybrid baby developed, returned to the ship to have the fetus removed and given up to the alien parent. The alien parents, purportedly, had the ability to communicate telepathically with their child. On occasion, according to victims' reports as told by Hopkins, the human parents were allowed to see their human-alien hybrid, or transgenic, children. Once a victim, according to Hopkins, abductees were powerless over the intrusions and susceptible to additional kidnappings which may extend to their (human) children. "If people have had one abduction experience," Hopkins said," then they will have others."
Critics of Hopkins' assertions about alien abductions contend that the alien abduction phenomenon is not as mysterious as Hopkins makes it out to be. Much of the phenomenon can, according to researchers such as Ronald K. Siegel of the University of California, Los Angeles, be explained as the consequence of "normal hallucinatory powers of the brain."
Sleep paralysis, for example, can produce the feeling that one is paralyzed or has difficulty moving. It can also produce the effect of floating or the sense of an out-of-body experience. Sleep paralysis occurs in a transition time and the person is in a dream-like state, hallucinations can occur just before falling asleep (hynogogic hallucination) or just after (hypnopompic hallucination). These hallucinations feel real to the person experiencing sleep paralysis and can often be accompanied by sensory features: musty smells, shuffling sounds, visions of ghosts, aliens, and monsters. Neuroscientist Michael Persinger of Laurentian University in Greater Sudbury, Ontario, Canada, believes that these sensations can spontaneously occur in some people, given the right set of circumstances, leading to the kind of feelings of "tremendous meaningfulness and fear" sometimes expressed by alleged alien abductees.
Hopkins rejected the idea of sleep paralysis, calling it "the big explanation du jour", and an inadequate explanation for those who experience abductions outside the bedroom.
Budd Hopkins