Psychedelics and the Hard Problem: What Theories of Consciousness Make of the 5-MeO-DMT Experience
Two Leading Theories of Consciousness
Consciousness remains one of science’s most stubborn open questions — philosopher David Chalmers famously dubbed the puzzle of subjective experience “the hard problem.” Two frameworks currently dominate the conversation. Global Workspace Theory treats consciousness as a kind of broadcast system: countless unconscious processes compete for access to a shared “workspace,” and whatever wins becomes the single, unified experience we’re aware of in the moment. Integrated Information Theory (IIT), developed largely by neuroscientist Giulio Tononi, takes a different approach, defining consciousness mathematically as a measure of how much integrated, irreducible information a system generates — the more a system’s parts depend on and inform each other as a whole, the higher its degree of consciousness.
Neither theory was built with psychedelics in mind, but both have become tools for testing ideas about the mind, precisely because substances like 5-MeO-DMT allow researchers to radically alter the contents of consciousness while keeping a person awake and reportable. That combination is rare and valuable: dreaming and anesthesia change consciousness too, but neither leaves a subject able to describe what happened in real time.
5-MeO-DMT as a Natural Experiment
A 2025 study in Neuroscience of Consciousness examined 5-MeO-DMT specifically as a pharmacological model of “deconstructed consciousness.” EEG recordings showed global reductions in alpha power and posterior beta power, consistent with the inhibition of the top-down predictive models that normally stitch together a sense of self and world. Subjectively, participants described states ranging from total ego dissolution to a paradoxical experience of “everything and nothing at once” — reports that sit uneasily with Global Workspace Theory’s emphasis on a single unified broadcast, but align more naturally with IIT’s focus on the underlying structure of integration itself, since the felt boundary between self and environment appears to be exactly what’s changing.
Neuroscientist Christof Koch, one of IIT’s most prominent proponents, has spoken publicly about his own 5-MeO-DMT experience, describing a felt sense of oneness with the universe that he has since tried to reconcile with his theoretical work on consciousness. That a rigorous consciousness researcher would turn to a psychedelic experience as a data point speaks to how seriously this territory is now being taken inside neuroscience, not just in wellness circles.
Final Thoughts
No current theory fully explains why altering a receptor’s activity should produce something as strange as the felt dissolution of self, and that gap is precisely what makes 5-MeO-DMT valuable as a research tool: it changes consciousness without switching it off, giving scientists a rare, waking window into what these theories are actually trying to describe. Understanding consciousness at this level is still very much in progress, and anyone drawn to explore these experiences firsthand should do so carefully and with experienced guidance.
