David Bryce Yaden, PhD is a Postdoctoral Research Fellow at Johns Hopkins Medicine working in The Center for Psychedelic and Consciousness Research. His research focus is on the psychology, cognitive neuroscience, and psychopharmacology of spiritual, self-transcendent, and positively transformative experiences triggered with psychedelic substances and through other means. Specifically, he is interested in understanding how these experiences can result in long-term changes to well-being and how they temporarily alter fundamental faculties of consciousness such as the sense of time, space, and self. He is the editor of Rituals and Practices in World Religions: Cross-Cultural Scholarship to Inform Research and Clinical Contexts. He is currently writing a book called The Varieties of Spiritual Experiences: A Twenty-First Century Update for Oxford University Press. His scientific and scholarly work has been covered by The New York Times, The Wall Street Journal, The Washington Post, New York Magazine, and NPR.