The Predictive Mind
Examine how modern psychological science has inverted classical models of cognition through the lens of predictive processing. Learn how the brain operates not as a passive sensory computer, but as a hierarchical Bayesian machine actively generating reality, emotion, and psychopathology.
Like Duolingo, but for The Predictive Mind. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A short one: 12 levels across 2 sections, about 24 minutes end to end, roughly 5 days at five minutes a day. It moves through The Architecture of Predictive Cognition and Affect, Allostasis, and Clinical Breakdown.
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Key ideas in The Predictive Mind
- Ascending feedforward pathways primarily signal prediction errors—the discrepancy between sensory expectation and incoming signals—rather than raw, uncompressed sensory data
- Predictable, expected inputs evoke attenuated ascending responses because top-down feedback efficiently cancels predictable components
- A novel or unpredicted stimulus elicits a sharp burst of feedforward ascending activity to update internal generative models
- Descending top-down connections transmit predictions that suppress anticipated sensory activity via inhibitory interneurons
- Perceptual experience and conscious attention are driven by the residual, unexplained prediction errors that demand model updating
- Highly predicted stimuli often fade from conscious salience unless given deliberate attentional precision
- Perceptual illusions are mathematically optimal compromises (maximum a posteriori estimations) balancing noisy sensory inputs against strong prior beliefs
- Structural priors, such as faces being convex or light coming from above, can dominate perception when sensory evidence is noisy or ambiguous
- Illusory percepts represent the generative model settling on the most probable hypothesis given the combination of priors and likelihoods
- Precision weighting acts as a dynamic gain control (volume knob) that tunes the relative influence of sensory error versus existing priors
- Psychotic hallucinations can be modeled as aberrant hyper-precision assigned to top-down priors over bottom-up evidence
- Autistic sensory hypersensitivity is frequently modeled as aberrantly high precision assigned to low-level prediction errors, preventing efficient top-down attenuation
- Hierarchical predictive architectures attempt to resolve prediction errors locally at the lowest possible sensory level using short-range recurrent loops
- Only residual prediction errors that cannot be accounted for by lower-tier predictions ascend to mid-level representational cortices
- Global semantic representations and high-level hypotheses are updated only when unmodeled errors cascade all the way up the cortical hierarchy
- Descending motor signals in active inference are descending top-down proprioceptive predictions (expected sensory states), not inverse dynamics commands specifying muscle contraction
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Predictive Mind the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What happens to sensory signals moving up your brain when a pattern behaves exactly as expected?
Get it right to open this lesson and 11 more in the app.
Where The Predictive Mind takes you
- 1
The Architecture of Predictive Cognition
- Perception as Error Minimization
- Active Inference and Motor Control
- 2
Affect, Allostasis, and Clinical Breakdown
- Interoception and Constructed Emotion
- Precision Weighting in Psychopathology
2 sections · 4 units · 12 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
The Predictive Mind is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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