The Brain's Reality: How Our Perception Shapes Our World In this episode of PsyberSpace, host Leslie Poston explores how our brains create different realities through predictive processing. The discussion includes concepts like the McGurk effect, the role of attention, and the impact of body states on perception. Poston explains how memory is a reconstruction influenced by current priors and how culture and language shape our prediction engines. The episode also addresses the implications for clinical settings, media influence, and the rise of DeepFakes. With practical tips for improving our prediction accuracy and updating our beliefs, this episode challenges the notion of objective perception and highlights the ethical stakes of our constructed realities. 00:00 Introduction: Living in Different Realities00:20 The McGurk Effect: Seeing is Believing03:47 Predictive Processing: How Brains Build Reality09:10 Attention and Perception: The Invisible Gorilla12:48 Interoception: Your Body Votes on Reality16:33 Memory: Reconstructing the Past19:46 Cultural Influence: Preloaded Predictions23:28 Neurodiversity: Different Prediction Parameters27:52 Manipulated Realities: Algorithms and DeepFakes32:59 Collective Reality: Synchronizing Priors37:12 Practical Steps: Flexibility and Accuracy40:08 Ethical Implications: Life or Death Stakes44:21 Conclusion: Stay Curious McGurk Effect (video via BBC)Green Needle Brainstorm Effect (video) Resources Bail, C. A., Argyle, L. P., Brown, T. W., Bumpus, J. P., Chen, H., Hunzaker, M. B. F., Lee, J., Mann, M., Merhout, F., & Volfovsky, A. (2018). Exposure to opposing views on social media can increase political polarization. Proceedings of the National Academy of Sciences, 115(37), 9216-9221. https://doi.org/10.1073/pnas.1804840115Botvinick, M., & Cohen, J. (1998). Rubber hands 'feel' touch that eyes see. Nature, 391(6669), 756. https://doi.org/10.1038/35784Clark, A. (2013). Whatever next? Predictive brains, situated agents, and the future of cognitive science. Behavioral and Brain Sciences, 36(3), 181-204. https://doi.org/10.1017/S0140525X12000477Colloca, L., & Benedetti, F. (2005). Placebos and painkillers: Is mind as real as matter? Nature Reviews Neuroscience, 6(7), 545-552. https://doi.org/10.1038/nrn1705Corlett, P. R., Frith, C. D., & Fletcher, P. C. (2009). From drugs to deprivation: A Bayesian framework for understanding models of psychosis. Psychopharmacology, 206(4), 515-530. https://doi.org/10.1007/s00213-009-1561-0Critchley, H. D., Wiens, S., Rotshtein, P., Öhman, A., & Dolan, R. J. (2004). Neural systems supporting interoceptive awareness. Nature Neuroscience, 7(2), 189-195. https://doi.org/10.1038/nn1176de Lange, F. P., Heilbron, M., & Kok, P. (2018). How do expectations shape perception? Trends in Cognitive Sciences, 22(9), 764-779. https://doi.org/10.1016/j.tics.2018.06.002Fletcher, P. C., & Frith, C. D. (2009). Perceiving is believing: A Bayesian approach to explaining the positive symptoms of schizophrenia. Nature Reviews Neuroscience, 10(1), 48-58. https://doi.org/10.1038/nrn2536Friston, K. (2005). A theory of cortical responses. Philosophical Transactions of the Royal Society B: Biological Sciences, 360(1456), 815-836. https://doi.org/10.1098/rstb.2005.1622Friston, K. (2010). The free-energy principle: A unified brain theory? Nature Reviews Neuroscience, 11(2), 127-138. https://doi.org/10.1038/nrn2787Garfinkel, S. N., Minati, L., Gray, M. A., Seth, A. K., Dolan, R. J., & Critchley, H. D. (2014). Fear from the heart: Sensitivity to fear stimuli depends on individual heartbeats. Journal of Neuroscience, 34(19), 6573-6582. https://doi.org/10.1523/JNEUROSCI.3507-13.2014Garfinkel, S. N., Seth, A. K., Barrett, A. B., Suzuki, K., & Critchley, H. D. (2015). Knowing your own heart: Distinguishing interoceptive accuracy from interoceptive awareness. Biological Psychology, 104, 65-74. https://doi.org/10.1016/j.biopsycho.2014.11.004Gotlib, I. H., & Joormann, J. (2010). Cognition and depression: Current status and future directions. Annual Review of Clinical Psychology, 6, 285-312. https://doi.org/10.1146/annurev.clinpsy.121208.131305Haley G. Frey, Lua Koenig, Ned Block, Biyu J. He, Jan W. Brascamp; Memory representations during slow change blindness. Journal of Vision 2024;24(9):8. https://doi.org/10.1167/jov.24.9.8.Henrich, J., Heine, S. J., & Norenzayan, A. (2010). The weirdest people in the world? Behavioral and Brain Sciences, 33(2-3), 61-83. https://doi.org/10.1017/S0140525X0999152XHohwy, J. (2013). The predictive mind. Oxford University Press.Keller, G.B., & Sterzer, P. (2024). Predictive Processing: A Circuit Approach to Psychosis. Annual review of neuroscience.Lafer-Sousa, R., Hermann, K. L., & Conway, B. R. (2015). Striking individual differences in color perception uncovered by 'the dress' photograph. Current Biology, 25(13), R545-R546. https://doi.org/10.1016/j.cub.2015.04.053Loftus, E. F. (1975). Leading questions and the eyewitness report. Cognitive Psychology, 7(4), 560-572. https://doi.org/10.1016/0010-0285(75)90023-7Loftus, E. F. (2005). Planting misinformation in the human mind: A 30-year investigation of the malleability of memory. Learning & Memory, 12(4), 361-366. https://doi.org/10.1101/lm.94705Lupyan, G., & Clark, A. (2015). Words and the world: Predictive coding and the language-perception-cognition interface. Current Directions in Psychological Science, 24(4), 279-284. https://doi.org/10.1177/0963721415570732Masuda, T., & Nisbett, R. E. (2001). Attending holistically versus analytically: Comparing the context sensitivity of Japanese and Americans. Journal of Personality and Social Psychology, 81(5), 922-934. https://doi.org/10.1037/0022-3514.81.5.922McGurk, H., & MacDonald, J. (1976). Hearing lips and seeing voices. Nature, 264(5588), 746-748. https://doi.org/10.1038/264746a0Nader, K., Schafe, G. E., & Le Doux, J. E. (2000). Fear memories require protein synthesis in the amygdala for reconsolidation after retrieval. Nature, 406(6797), 722-726. https://doi.org/10.1038/35021052Nickerson, R. S. (1998). Confirmation bias: A ubiquitous phenomenon in many guises. Review of General Psychology, 2(2), 175-220. https://doi.org/10.1037/1089-2680.2.2.175Pariser, E. (2011). The filter bubble: What the internet is hiding from you. Penguin Press.Pellicano, E., & Burr, D. (2012). When the world becomes 'too real': A Bayesian explanation of autistic perception. Trends in Cognitive Sciences, 16(10), 504-510. https://doi.org/10.1016/j.tics.2012.08.009Pressnitzer, D., Sayles, M., Micheyl, C., & Winter, I. M. (2008). Perceptual organization of sound begins in the auditory periphery. Current Biology, 18(15), 1124-1128. https://doi.org/10.1016/j.cub.2008.06.053Qi, J., Peng, J., & Kang, X. (2025). Predictive processing among individuals with autism spectrum disorder during online language comprehension: A preliminary systematic review. Journal of Autism and Developmental Disorders. https://doi.org/10.1007/s10803-024-06704-9Raymond, J. E., Shapiro, K. L., & Arnell, K. M. (1992). Temporary suppression of visual processing in an RSVP task: An attentional blink? Journal of Experimental Psychology: Human Perception and Performance, 18(3), 849-860. https://doi.org/10.1037/0096-1523.18.3.849Rensink, R. A., O'Regan, J. K., & Clark, J. J. (1997). To see or not to see: The need for attention to perceive changes in scenes. Psychological Science, 8(5), 368-373. https://doi.org/10.1111/j.1467-9280.1997.tb00427.xAllostatic Interoceptive Overload Across Psychiatric and ...