Dr. Pedram Shojai
Episode Description:
Pedram unpacks the neuroscience of predictive processing, the idea that the brain doesn’t passively record reality but constantly generates a model of what it expects to happen, then treats sensory input as error signals used only to correct that model. Drawing on the work of Karl Friston, Lisa Feldman Barrett, and Anil Seth, he explains how this reframes emotions as predictions rather than reactions, and how chronic stress, scarcity, and a fixed sense of self all become self-reinforcing “priors” that color everything we experience. He connects this directly to the Daoist concept of pijian, the dust on the mirror, and leads a guided meditation on releasing labels and expectations to encounter the present moment more directly. The episode closes with a practical inquiry: identifying which prior (threat, scarcity, or fixed self) is running quietly in the background of your life, and what new experience might begin to update it.
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Podcast show notes:
[00:00] The Lemon Experiment
- Pedram describes a sound and a taste in detail to demonstrate the brain generating a physiological response before any real sensory input arrives
- The nervous system reacts to a prediction, not to reality itself
[00:02] The Brain as Prediction Machine, Not Recording Device
- Nearly everything we experience is a model constructed before sensory data arrives, only slightly updated by what’s actually out there
- Introduces predictive processing as a major shift in neuroscience over the last century
[00:04] Karl Friston and the Free Energy Principle
- Friston’s framework, one of the most cited in neuroscience, shows the brain works top-down, generating predictions that flow downward while sensory signals act as error/mismatch signals
- The brain’s core job moment to moment is minimizing prediction error
[00:07] Lisa Feldman Barrett and Constructed Emotion Theory
- Her book How Emotions Are Made argues emotions aren’t fixed circuits but predictions built from interoceptive signals and past emotional history
- You don’t feel angry because something is objectively anger-worthy; you feel angry because your brain predicted anger as the likely interpretation
[00:10] Anil Seth and Controlled Hallucination
- Seth’s book Being You frames perception as a “controlled hallucination,” with consensus reality being the hallucinations we happen to agree on
- The difference between ordinary perception and psychosis is how much sensory error is allowed to update the model
[00:13] Connecting to the Default Mode Network
- Last week’s topic, the self-referential narrative, is also a predictive model: who you believe you are becomes the predictor
- A self-model out of touch with shared reality is where dysfunction, including narcissism, takes root
[00:14] Why Priors Get Stuck
- Prediction error is metabolically costly, so the brain is biased to confirm existing priors rather than update them
- Predicting threat or failure creates a self-reinforcing feedback loop that is architectural, not just psychological
[00:15] The Body Feeds the Model
- Barrett’s lab and Bud Craig’s research show predictive models are built substantially from interoceptive data
- Chronic sympathetic activation, inflammation, and fragmented mitochondria feed the brain threat-flavored data, regardless of actual circumstances
[00:17] Pijian: The Dust on the Mirror
- Daoist internal alchemy describes the original mind as a clear mirror that accumulates “dust”: conditioned responses, emotional residue, cultural assumptions
- Predictive processing gives a modern mechanism for this ancient concept
[00:20] Neiguan and Generating New Prediction Errors
- Inner observation practice allows raw sensory/interoceptive data to reach awareness without habitual predictions overlaid
- Sitting with what’s actually arising gradually updates the brain’s priors, “polishing the mirror”
[00:22] The Three Core Priors: Threat
- A brain shaped by stress or relational insecurity fills ambiguous information with threat by default
- This isn’t pessimism, it’s a calibrated prediction based on a history that contained real threat
[00:25] The Three Core Priors: Scarcity
- A prior formed from material, relational, or metabolic depletion creates chronic urgency and difficulty receiving good things
- Practices of sufficiency and gratitude, repeated experiences of “enough,” are how this prior updates
[00:28] The Three Core Priors: Fixed Self
- The belief in a solid, unchanging self determines the ceiling of possible change
- Observing thoughts and emotions arise and pass loosens identification with a fixed self and generates prediction errors around impermanence (anicca)
[00:30] Guided Practice: Prior Watching
- A meditation inviting attention to the present moment exactly as it is, without labels, comparisons, or anticipation
- Includes a 30-second exercise releasing verbal labels to access raw, pre-conceptual experience
[00:36] Beginner’s Mind and Closing Reflection
- The predictive brain framework isn’t depressing, it means experience is malleable and models can be rebuilt through new experience
- A hundred days of consistent practice is prior-updating work: each honest moment of attention feeds the brain new data
[00:39] Practice Assignments
- Choose one recurring emotion today and ask: is this coming from the present moment or from a running prior?
- Spend 60 seconds during an ordinary activity experiencing something without applying any labels
- Identify which of the three priors (threat, scarcity, fixed self) is most quietly active in your life right now, and name it
KEY TAKEAWAYS:
- Your brain doesn’t record reality, it predicts it, and sensory input mostly just corrects the model
- Emotions are predictions built from your body’s history, not automatic responses to events
- Prediction error is costly, so the brain favors confirming old patterns over updating them
- A stressed, inflamed body feeds the brain threat-flavored data regardless of actual safety
- The three most common entrenched priors are threat, scarcity, and a fixed sense of self
- Naming a prior gives you distance from it, and distance is where change becomes possible
- A hundred days of consistent practice is what actually rewrites the predictive model
RESOURCES MENTIONED:
- Karl Friston, University College London — free energy principle
- Lisa Feldman Barrett, Northwestern University — constructed emotion theory, How Emotions Are Made
- Anil Seth, University of Sussex — Being You (2021), controlled hallucination
- Bud Craig — interoceptive research on predictive models built from body signals
- Daoist internal alchemy concept: pijian (dust on the mirror), Neiguan (inner observation)
This episode is for educational purposes only and not intended as medical advice. Consult with qualified healthcare practitioners for personalized guidance.
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