Psychic Vibrations Alien Stigmata, Shy Craft, and a UFO Conference Robert Sheaffer From: Volume 18, No. 1 Fall 1993 ShareTweet Robert Sheaffer Robert Sheaffer’s “Psychic Vibrations” column has appeared in the Skeptical Inquirer for the past thirty years. He is also author of UFO Sightings: The Evidence (Prometheus 1998). He blogs at www.badUFOs.com. See more articles This article is available to subscribers only. Subscribe now or log in to read this article.