Andrew M. Haun
Department of Psychiatry, University of Wisconsin-Madison
Integrated information Consciousness is intrinsic causal power, measured as integrated information
Andrew M. Haun is an Assistant Scientist in the Department of Psychiatry at the University of Wisconsin-Madison, working within the Wisconsin Institute for Sleep and Consciousness. His research investigates the visual system, spatial perception, and the mathematical formalization of phenomenal structure.
Haun is a key co-author of the foundational paper “Integrated information theory (IIT) 4.0, Formulating the properties of phenomenal existence in terms of cause-effect power” (2023, with Larissa Albantakis, Matteo Grasso, and Giulio Tononi). Haun’s work specifically demonstrates how 2D and 3D grid-like topological wiring diagrams in the visual cortex unfold mathematically into rich, extended spatial Phi-structures that mirror the phenomenal geometry of visual consciousness.
Haun’s contributions bridge abstract information theory with concrete sensory neuroanatomy, demonstrating that the qualitative structure of an experience corresponds one-to-one with the shape of its maximally irreducible cause-effect complex.
Known for. Co-author of Integrated Information Theory 4.0 (IIT 4.0), visual psychophysics, spatial cause-effect structures, cortical grid geometries
Coverage on this site
Related researchers
- Giulio TononiUniversity of Wisconsin-MadisonIntegrated information theory and the quantity phi
- Larissa AlbantakisUniversity of Wisconsin-Madison, Center for Sleep and ConsciousnessIntegrated Information Theory 4.0 and dissociating intelligence from consciousness in artificial systems
- Costas AnastassiouAllen InstituteEphaptic coupling of cortical neurons, endogenous electric fields as causal participants in neural activity, extracellular field biophysics
- Anton ArkhipovAllen Institute for Brain ScienceLarge-scale neural simulation, biophysically detailed cortical models, AIBRAIN program, State of Brain Emulation Report 2025
- Bernard J. BaarsThe Neurosciences InstituteGlobal Workspace Theory (GWT), cognitive architecture of conscious access, A Cognitive Theory of Consciousness (1988), In the Theater of Consciousness (1997)
- Adam B. BarrettSussex Centre for Consciousness Science, University of SussexContinuous field formulations of Integrated Information Theory, Measure-theoretic Phi, practical complexity measures, Granger causality
Andrew M. Haun is listed with the other integrated information theorists, who hold that consciousness is intrinsic causal power, measured as integrated information. The theory family behind that position is set out in the index of consciousness theories. Every researcher covered on this site is indexed in the directory of consciousness researchers.